Chris was in position but it'd gotten more difficult as his shield bits had been destroyed and he'd had to eject from the Mandroid he'd come in on. Turning to kick a Skrull hard in the chin he brought his heel down on the back of it's head smashing it's skull against the concrete and turned to put a shotgun shell into another's chest as he re-lit his cigarette from the heat of the barrel between level pulls.
Typing on the keyboard he frantically tried to get the SHIELD override codes to work but he couldn't get it to go and decided to go with plan B and jammed the pulse rifle through the shielding using all his strength to get the bayonet to touch the Tesseract to shut it down - finally succeeding as the backlash knocked him back almost into Tony. "Well I'll be a son of a bitch! It worked!"