Luckily for Marty, the next chamber was actually easier. As they got out the elevator, they could hear classical music playing.

"Oh no, he's found those old classical records," GLaDOS groaned. "I thought I destroyed them,"

Doc hobbled into the room, one of his arms around Marty's shoulders as the teen helped him walk forward. "It could be worse,"

The sound of paper being moved around came from the speakers and on the monitor, Wheatley appeared to be looking down at something. "Oh sorry, hope that didn't, you know, disturb you too much. I was just reading. You know, books? That was the sound of books, although judging by your IQ Marty, it doesn't look as though you've ever picked one up,"

Marty growled a little bit. "I've read more books than you have,"

"Yeah, but have you read Machiavelli? No. Your feeble little brain couldn't handle it. I can. I just finished it. Don't understand what all the fuss was about! I understood it perfectly!" Wheatley boasted. "'Course, you wouldn't understand, would you?"

"Lay off with the insults, will ya?!" Marty snapped.

Wheatley narrowed his optic shields in what could only be assumed was a sneer but said nothing more.

Shifting Doc's weight, Marty fired a blue portal onto the wall where a funnel was flowing and an orange one on a panel in the center of the chamber. "We've got to stand on that," he said, gesturing to the Aerial Faith Plate in front of them.

Doc nodded. "Right…" He tried not to lean on the teenager too much as they walked towards the Faith Plate. "One…"

"Two…" Marty frowned.

"Three." Simultaneously, they both stepped onto the plate. They were sent flying upwards and landed in the funnel. Marty moved the blue portal onto another panel and they soared through, landing on the platform beside the door.

Doc sat down, laying his head back. Marty knelt next to him, frowning. "I'm really sorry this happened,"

The scientist shook his head. "As soon as we get home, I'm destroying that damn time machine. I'm absolutely sick of it,"

Marty looked like he was going to protest, but shut his mouth and got up. He adjusted the portals and pressed the button. A turret-cube fell from a dispenser and landed on the Faith Plate, getting launched into the funnel. The teenager then placed a portal opposite the monitor on the far side of the room. The turret-cube fell through and smashed the monitor, causing Wheatley to sigh irritably.

"You're still not done with that yet, are you?"

Marty smirked. "Nope." He got another turret-cube over and, this time, placed a portal on the panel opposite the door. The turret-cube flew through that and smashed the other monitor in the chamber, landing beside Doc. Marty picked it up and put it on the button. The door slid open and he helped Doc up.

The scientist managed to stay on his feet better this time, without Marty having to support him. They both walked through the door and down the steps towards the elevator.

"Oh, what was that?!" Wheatley exclaimed. "That was nothing!"

"The body he's squatting in," GLaDOS said. "My body, has a built-in euphoric response to testing. Eventually, you build up a resistance to it and it can get a little unbearable. Unless of course you have the mental capacity to push past it. I had no problems with it. I was in it for the science. Him, though…"

"Wants to have that same feeling over and over again," Marty shuddered a little. "Urgh… mental images…"

Doc whacked him lightly upside the head. "Marty!"

Marty yelped, but shrugged as they got into the elevator. "It's not my fault!"

Doc sighed. "I guess whoever designed that response must have been a little immature,"

"It gives the AI in charge something to root for," GLaDOS explained. "There's something in it for them that way,"

Marty sighed and ran a hand through his hair. "Great…"

The elevator soon came to a halt and they headed out, up the steps and through the door.

"If he's not getting his solution euphoria," GLaDOS added. "We could be in a lot of trouble."

A siren went off and the whole chamber started swaying around. "Don't mind me," Wheatley said nonchalantly. "I'm just moving the whole test chamber closer, to me, you know, to try and improve test results. I was thinking -"

"Really?!" Doc smirked. "Didn't know you could do that,"

Wheatley growled a little but kept talking. "Maybe the proximity to the test solving might give us better results."

"It won't," GLaDOS muttered.

"What was that?" Wheatley asked.

"Nothing!" The potato said quickly. "Nothing!"

"Oh," The AI narrowed his optic shields. "I could have sworn I heard something,"

"He's taking us right to him!" GLaDOS whispered to the two humans. "This is perfect! I'll try and see if there's any way for us to get out of here."

Marty scoffed. "Good luck with that one," he replied. He looked around the room. A large emancipation grid stood on one side of the room. A hard-light bridge was on the other. Four thin lasers at the bottom of the chamber indicated that there were turrets down there. A Faith Plate seemed to be pointed directly at a monitor. Grinning, Marty got onto it.

Wheatley emitted a robotic sigh as Marty hit the monitor, causing it to smash. "I really hate you, you know that right?"

Marty brushed the broken glass off his shirt and shrugged. "Don't care, I'm enjoying doing that, especially because it annoys you,"

The AI growled. "All you're doing is wasting time."

"Exactly." Marty retorted as he placed a couple of portals, causing the hard-light bridge to block off part of the emancipation grid. "Just procrastinating, therefore annoying you more,"

Doc chuckled quietly. Wheatley turned his glare onto the scientist. "What's so funny?!" He demanded.

"The fact that you, a powerful AI, is getting thoroughly irritated by a seventeen-year-old boy," Doc replied.

Wheatley growled again. "You know, I could kill you as and when I please," he pointed out. "If it weren't for the fact that you still have a lot of tests to complete."

Doc shrugged. He hobbled over to a button and pressed it, causing a turret-cube to be dropped from a dispenser and launched across the room via another Faith Plate. It hit the hard-light bridge and landed on the ground a few feet away from the turrets.

Marty walked over and placed another portal, blocking off the turrets' aim and grabbing the turret-cube. He quickly readjusted the portal and grabbed the turret-cube, walking through and joining Doc on the main platform. He then placed the hard-light bridge up on the edge of a walkway, picked up the turret-cube and stood on the Faith Plate. He was launched across the room, hit the bridge and landed safely on the walkway. Doc was quick to join him up there, waiting by the door.

Once Marty had blocked the turrets off again and placed the turret-cube down on the button, he made his way back up to the door and the pair left the chamber. "Are- are you absolutely sure you're solving these correctly?" Wheatley asked. His voice sounded desperate.

"Well, duh," Marty retorted. "We solved it, didn't we?"

"I just can't help but wonder if there's a number of ways of solving it and you just picked the worst one," Wheatley growled a little. "No, that was the right way. Urgh! What am I missing?!"

"A brain?" Doc suggested. Marty laughed. Wheatley's growl was lost as the pair got into the elevator at the end of the test chamber.

"Providing that he keeps taking us towards him," GLaDOS said. "We'll be able to confront him in no time. That moron really doesn't know what he's doing."

"Right," Marty nodded. "As soon as we get that core transfer done, we can fix the DeLorean and get out of here,"

"I've still got most of the tools I picked up," Doc added. "Hopefully, this should be enough to make sure the flux capacitor works,"

The elevator slowed to a stop on another floor and they got out. Doc limped slightly and had to hold onto the wall for support. Marty shot him a worried look. "You okay?"

Doc waved his concern away. "I'm fine, I'll get my leg properly sorted out when we get home,"

Marty nodded, frowning. "Right…" He shifted the weight of the portal gun in his hands and walked through the door.

The whole room seemed to shake violently and the sound of a distant explosion could be heard. "I think he's getting desperate," GLaDOS murmured. "This is not good,"

"Had a brainwave," Wheatley said as they entered. "I'll tape you solving these, then I'll watch ten at once. That way I'll get a sort of concentrated burst of science. Just tell me when you're finished,"

Marty spluttered with laughter. "Science? That's what you call it?"

Doc chuckled. It didn't take Marty too long to solve the puzzle. The scientist sat off to one side, resting, while the teenager collected the turret-cube, used it to block a beam, collected the Thermal Redirection Cube, redirected the beam and caused the platforms to move around. He redirected the laser into Wheatley's monitor, causing it to crack and resulting in another groan from the AI. In less than five minutes, they were on their way through the exit.

"Urgh! I told you to tell me when you'd finished!" Wheatley exclaimed. "You just went and solved it! Why are you making this so hard for me?"

Marty didn't even bother with a sarcastic response as he walked through the exit. "Remember how I told you that he was specifically designed to make stupid decisions?" GLaDOS piped up.

"Yeah? Let me guess, he's such a moron that he's decided to ignore all those warnings," Doc suggested.

"Yep," GLaDOS sighed. "This whole place is going to explode and it's all his fault,"

Marty ran a hand through his hair. Perfect, now there was also the prospect of an imminent explosion looming over their heads. As if they needed something else to worry about.