The hand

This is Stubbs's mind control power. Stubbs rips off his left hand and throws it, from there it can control all enemies by jumping on their heads, except those with helmets, the hand is fast moving and can crawl across surfaces like walls and ceilings. The hand can be easily destroyed so watch out for armed enemies.

Trivia

 * Sometimes during jumps the hand shows middle finger.
 * There's a bug when it can possess a person with helmet, if the person uses machine gun.