9:40 PM PST
As Doc '85 was hovering the DeLorean, he was thinking about how he would have to destroy the time machine. He figured that Marty Two must be rather hungry by now. He felt pretty bad for his young friend, and he began to wish he hadn't been quite so rash in deciding to bring Marty to the 2015 with him. It wasn't very fair to Marty.
"Damn!" Doc '85 muttered, after he accidentally hit the Lyon Estates billboard. He was unaware he also turned the time circuits on, or what the destination time had read. The DeLorean then flew off with a flag pennant attached to the rear wheel.
As Doc 85 drove to the school, he had ambivalent feelings about this day. On one hand, this really was a day that was rather significant to all of Hill Valley, and was even more significant to him and Marty. On the other hand, this day was also real stressful to him and Marty - both times around, that is.
oooooooooo
As soon as Marty Two entered the gym, he noticed how Marvin Berry was singing on the stage - while his younger self was playing the guitar. He then noticed his parents were dancing, having kissed just a moment ago. It was such a surreal experience.
"Earth Angel, Earth Angel, will you be mine?" Marvin was singing. "My darling dear, love you for all time."
Marty Two saw George waving to Marty One up on the stage, while Marty One waved back. It felt so strange to actually see themself from a different position.
"I'm just a fool," Marvin finished singing, "a fool in love, with you."
The dancers all cheered, as George and Lorraine kissed one more. Just then, Biff's gang entered the gym. Marty Two quickly hid underneath the refreshment table, in time. His hat fell off, but he managed to grab it just in time.
"Let's do another one!" Marty Two could hear Marvin saying to his younger self.
"Where'd he go?" Skinhead asked, confused. "He just came in here?"
"Something that really cooks," Marty Two heard his younger self saying.
"Look," 3-D pointed out. "How'd he get up on stage?"
"I dunno," Skinhead replied, "but, when he gets down, we're gonna nail him."
"How the hell'd he change his clothes so fast?" Match demanded.
Marty Two was suddenly horrified, as he realized what was going to happen.
oooooooooo
"Yeah, man, that was good," Marvin said, impressed. "Let's do another one!"
"Uh, well, I gotta go," stammered Marty One, as he realized how late it was.
"C'mon man," insisted Marvin, "let's do something that really cooks."
"Something that really cooks," mumbled Marty One. He thought for a minute - then he came up with the perfect piece. Marty One turned to the dancers, as he said, 'All right! All right, this is an oldie - but, uh, it's an oldie where I come from." Marty then turned to the Starlighters, and he added, "All right, guys! It's a blues riff in B, watch me for the changes - and uh, try and keep up, okay?"
Marty One started to play the famous intro from the song. The dancers and the band seemed to like it, so Marty One started to sing. He was really enjoying himself, now
oooooooooo
Marty Two watched Biff's gang go up to the side of the stage, as Marty One began to play. The gang was there, waiting for him to finish the song - so that they could beat him up. Marty Two quickly got out his walkie-talkie.
"Doc!" Marty Two called out, as he was anxious. "Doc, come in!"
"Marty, come in!" Doc '85 replied.
"Listen, Doc," Marty Two explained, "Biff's guys chased me into the gym and they're gonna jump... me!"
"Then get out of there!" Doc '85 insisted, as though the answer should be obvious.
"No, Doc, not me!" Marty Two called back. "The other me! The one's that's up on stage playing Johnny B Goode!"
"Great Scott!" Doc '85 gasped, with major panic. "Your other self will miss the lightning bolt at the clock tower, you won't get back to the future - and we'll have a major paradox!"
"Wait, wait, a paradox?" Marty Two asked, stunned. "You mean one of those things that could destroy the universe?"
"Precisely!" Doc '85 replied. "Marty, you have to stop those guys at all costs - but without being seen by your other self or your parents!"
"10-4!" Marty Two replied, as his heart was racing.
oooooooooo
"Now this is getting real intense," Marty Jr commented, as he watched Marty Two making his way to the stage. "Dad needs to prevent Biff's gang from jumping his other self. Well, at least my grandparents kissed for the first time."
"Hey, George," called out a boy dancer, as he was obviously impressed. "heard you laid out Biff, nice going!"
"George," added the girl dancer, "you ever think of running for class president?"
"It seems like George has become Mr. Popularity in just a matter of moments," said Harmony, as she was amazed. "I can see how your dad is having quite so much fun performing on the stage. Everyone, including your parents, are having a lot of fun!"
"Yeah, but my dad's other self has the hard task," Marty Jr observed. "He not only has to stop the gang, but he also has to not let anyone else see that there are two versions of him. Now I'm really starting to appreciate what Dad went through."
oooooooooo
Biff was starting to regain consciousness, as Lester was slapping him awake. He had to get his revenge on that Calvin Klein punk right away.
"Where is he?" Biff asked, as he turned towards Lester.
"Who?" asked Lester, as he seemed a little confused.
"Calvin Klein," replied Biff. He was not going to let Calvin get away this time.
"Who?" asked Lester, as he seemed somewhat taken aback.
"The guy with the hat," Biff explained. "Where is he?"
"Oh," said Lester, as he pointed towards the gym. "He went that away." As Biff ran to the gym, Lester called out, "I think he took your wallet!" After he turned towards the crowd, he repeated, "I think he took his wallet."
oooooooooo
"Go Johnny go, go, go," Marty One was singing. "Johnny B Goode."
Marty Two hummed along for a few moments, before he noticed where Biff's gang was. They were actually standing on the side platform, with some weapons - while they were waiting for Marty One to finish playing, so that they could beat him up.
"Go, go, go Johnny go, go," Marty One continued singing. "Go Johnny go, go, go...
go Johnny go, go... Go Johnny go, go, go... Johnny B Goode."
Marty Two then spotted some sandbags above Biff's gang. Very carefully, he climbed the rigging above the stage, as he slowly crawled across it.
At that moment, Marvin headed towards the edge of the stage - where there was a telephone. He dialed a number, as Marty Two watched.
"Chuck, Chuck," Marty Two could hear Marvin saying, "it's Marvin. Your cousin, Marvin Berry! You know that new sound you're looking for? Well, listen to this!" Marvin held the phone to the music so Chuck could hear it.
oooooooooo
Marty Jr and Harmony were dancing around, as Marty One was playing Johnny B Goode. Marty Jr watched on, as everyone else continued to dance along.
"You know, Marty," Harmony pointed out, "I really have to admit that I prefer your father's version of this song over the version done by Chuck Berry. It is rather too bad nobody was around to record that song. This version really does rock!"
"I can see how Dad has really gotten into this song," Marty Jr commented, as he was amazed. "Hey, Harmony! It sure looks as though he's about to launch into that guitar solo. He's now strumming that guitar behind his back, just like Jimi Hendrix."
"The band doesn't seem real impressed anymore," Harmony commented. "They are looking at him with a confused expression. Now he's striking power cords. I think he wants to be the one to invent hard rock himself. Not only is hard rock a big shock to this crowd, but he is also risking a time paradox. Grandma would not approve."
"He seems have forgotten he was 1955," Marty Jr said, with concern. "I mean, after Led Zeppelin recorded their album, they received a lot of criticism. The people from that era just weren't ready for that style of music, yet. Know what I mean?"
"Yes, I sure see what you mean," Harmony replied, nodding. "Oh, boy, now he just kicked over that amplifier. Everyone is now staring at him, almost like he's really a madman. It sure doesn't like this performing is going to go over too well."
"Yeah, his performance will probably go down like a lead balloon," Marty Jr replied, "or like a lead zeppelin. Hard rock really was not invented until the late '60s."
oooooooooo
Marty Two tried to untie the rope holding up the sandbags. "Come on," Marty Two grumbled, a bit. He finally managed it, and the sandbags fell on Biff's gang.
"Oomph!" mumbled the members of Biff's gang.
Meanwhile, Marty One really went overboard - and, by the time he finished playing some rock music, everyone was silent, looking at him. Mr. Strickland was covering his ears. Marty Two felt a little embarrassed by his younger self's actions.
"I guess you guys aren't ready for that, yet," Marty One said, blushing, "but your kids are gonna love it." Marty then handed the guitar back to Marvin.
Marty Two felt triumphant, as he just gave the rope another tug. This time, the gang was knocked out cold. His younger self stopped briefly, as he seemed real surprised to see that the members of Biff's gang were unconscius under the sandbags.