.223 caliber 55 grain, your average projectile size, vs ballistic gel. Makes for a big cavity.
Did you miss the part right before, where a molotov was thrown at shooter?
Shooting victims usually land with feet crossed, when the light is shut off. Taser or bullet, doesn't matter, long as lights go off. And yes, headshot guy throws a molotov at shooter as they run in between the cars.
He no longer has control of his hand, the muscles are pink misted. Hand is stuck in contraction. Didn't you watch ANY episodes of NCIS? :P