also, if a human can fight through pepper spray i'm quite sure a bear on a mission can. if you are being charged, by the time the bear is within pepper spray range he/she is on top of you before the effect takes place. once he/she is on top of you, the bear does not need to see you to kill you. in my opinion, only an idiot (not calling anyone on here names) would attempt to stand their ground with pepper spray.