I've been pepper sprayed, and I had the unfortunate luck of being in the process of breathing in as I got the blast. Not good. I thought I was dying... the pain in my eyes and the fact that I couldn't breathe was awful.
Tasers are momentary stun devices and you don't have to sit around for 20 minutes flushing your eyes out and coughing up crap (that burns as much on the way up as it did on the way down) afterwards.
