Even though he had gone on the field op with the intentions of helping Derek, he couldn't help but feel a little giddy as he slid the FBI jacket on; wearing it felt like a full circle thing even though he had grown up with his dad being a deputy turned sheriff, he had the same feeling that he did when he begged his dad to let him try on his Beacon Hills County Sheriff jacket the day he had gotten elected. It was nearly falling off of Stiles due to the size difference, but the picture with his wide grin was still one of his favorites.
That being said, as the more experienced agents were shooting and running around trying to find who they described as a "feral mass murdering unsub", Stiles had slid into the back entrance, his pistol attached to his hip; he didn't want to make any extra noise but he also needed to find Derek before one of the agents did.
Sneaking around in the dark made his heart pound as he remembered the night they had snuck into Eichan House to save his girlfriend, being confronted by staff on one side and Theo's pack on the other. If he didn't have the desperate priorities he did, he would have walked right back out and waited in the van as back up like he had been told since he wasn't technically supposed to be here as a fresh intern and maybe, just maybe, allowed his panic to take over.
But he kept walking in the shed, his hand securely on his gun as a reassurance more then anything. What happened next was a blur as Stiles was pushed to the ground as a gun went off, followed by a sharp shooting pain that went from his foot all the way up his leg; he couldn't stop from crying out in pain, using the screams to keep the tears in.
"What the hell are you doing here?!" He knew that voice all too well and he knew that it was Derek who was trying to get him to stop screaming by syphoning the pain out of his body long enough for him to respond.
"I'm trying to help you!"
"By getting shot?!"
"He was about to shoot you! You gotta come back to Beacon Hills, Scott said shit's hitting the fan."
"We need to get you out of here right now. Can you walk?"
"I don't think so," Stiles muttered, letting out another cry of pain as Derek wrestled his foot free from the still smoking boot, allowing him to see the broken flesh and he had to fight from throwing up on the stone ground with another scream, "I think limping's out of the question too."
The sigh Derek let out was long and drawn out as he stopping taking his pain before lifting Stiles into his arms, forcing the screams and cries out from Stiles' throat in waves as he clung to Derek's neck in order not to fall and hit his head.