At Black Mesa Facility

Doc arrived at a Research facility known as Black Mesa, he realized the facility was lay ruins then he got spotted by a US marines soldier known as Sergeant , he uses the M4 rifle at Doc.

Sgt. GreySef: Freeze, put your hands up, this is us marines.

Doc uses the magic ability: Smokescreen, to escape from Sgt. GreySef. Sgt. Grey saw Doc escape through the bus escalator

Sgt.GreySef: YOU STOP RIGHT HERE!!!

Doc: You will never catch me!

SGT. GreySef hopped on the MTM-8 as he gonna chase Doctor on the bus escalator

MTM-8 was driven by Sgt. GreySef chasing on the bus escalator. On the window, DrDestiny middle finger on Sgt. GreySef

Doc: See ya later and never catch me, Motherfucker!

Sgt. GreySef auto-pilot the MTM-8 while he grabbed the RPG until he's gonna aimed the wall so that the Bus Escalator stopped. He aimed Gently and then pull the trigger. The rocket missile headed straight close to Bus Escalator and Doc realized he missed the shot.

Doc: Ha, you missed it!!!

Sgt. GreySef: Did I?

The missile blasts the walls, and the ceiling was about to collapse, Doc tried to escape by using his magic but unfortunately, Doc has been injured after the ceiling collapse. MTM-8 stopped right there near the Bus escalator crash site. He looked down and switch his rifle with his pistol, he pointed at DrDestiny and shot him on the head. And so won the battle and move on the next round.