Complex sentence: Gonzales rushed into the room next and tripped on the floor, falling in front of Mixon and being struck in the head by a bullet, although it was deflected by his tactical helmet, which protected him from injury.
Split into simpler sentences: Gonzales rushed into the room next and tripped on the floor, falling in front of Mixon. Mixon shot at Gonzales while he was falling and may have struck Gonzales in the head, although the bullet was deflected by Gonzales' tactical helmet, which protected him from injury.