So Mark is dragging an infected dude around the Berg, but Alec doesn't seem to notice. He's pretty zoned out.
Mark then tosses the guy out the window, but the guy holds onto Mark, pulling Mark with him.
The Berg is now up in the air, and Mark is falling out with some infected guy.
A huge struggle ensues, and Mark does all he can to lose the guy. He can't though, and gravity is pulling him down.
Finally, Mark is able to kick the man's neck and then push him outward into the path of the Berg's thrusters. The flames engulf the man's head and shoulders.
Mark starts to feel like he's truly going mad at this point.