Shouldn't maybe say this but somebody tried to mug me at knife point in Texas a few years ago. Rightly or wrongly you can buy, quite legally over there, tasers and mace.
Silly twat got a faceful of mace which slowed him down a bit !
I got ripped off by a training company in Brighton however, having investigated them I discovered that they were trading under false pretences and now they no longer exist.
Bit of closeure there.