I didn't understand the end. What did the sniper shoot the extremis guy with that deactivated his powers but didnt kill him?
The one scientist guy (Fitz?) was up there with generic action team member so I assumed he had worked out an antidote at the last minute. I believe they had shown them packing up some sort of dart rifle on the jet, so I'd guess that's what he was shot with. No idea why he decided shooting the antidote into his forehead was the best delivery method though. I assume they just did that to fake everyone out for a second, but it just made it confusing.