Well, if you sprayed some on a 250 lb. crazy ass chav, he might just go crazy. I've seen lots of vids on the net where there are 4 cops all beating on one guy while spraying him in the face with mace, and he is still fucking all of them up, going crazy, punching them in the face, etc etc.

But a tazer puts so much voltage in you that you fall to the ground in pain (sometimes it makes the bowels release involuntarily ) i bet you'd love to make a chav litterally shit his pants....