As I mentioned in another thread, my younger brother (14 at the time, maybe 110 lbs) sprayed himself
with Bodyguard. Since he was doing the spraying, it was obviously point-blank. There was no discernible effect for several minutes. He began crying after about 8 minutes. He, as Edmund said (disregard Edmund's personal experience BTW, he's a mutant
), was inconvenienced, not incapacitated, at any
time. This lead me to believe that foam will work best, but have your backup handy.