@ the idiots who say GI dived headfirst only show themselves to have no idea and have probably never played a game in their lives. In the moment it all happens in a fraction of a second. All of a sudden someone has your legs and you're off the ground, for all you know you're a second away from a broken neck. It is natural instinct to try to get yourself to ground as soon as possible.
The offense happens before he even makes contact with the ground. Faaoso gets a hand in between the legs, lifts and puts GI over the perpendicular. As soon as that happen Faaoso has done the wrong thing. GI has every right to do what comes naturally and protect himself as well as possible after he has been put in such a vulnerable position.