Gorilla? Get ripped and pummeled to a pulp.
you wouldn't be able to. you probably would never see them coming, and if you did his buddies would come after you. and nowadays, i think it'll be really hard to find a guerrilla to ninja kick. perhaps you mean gorilla? and if a normal person kicked a gorilla he would be squashed to death. if you were a ninja, you would be smart enough to not kick a gorilla.
If the gorilla has been watching youtube he might ninji chop you,....or judi chop you, or karate chop you so be careful and brush up on your lesson with the West Virginia Ninja:
most likely the guerrilla would be an expert in "guerrilla warfare" and will probably kill you before you even know where he is