I posted this regarding OC/Pepper spray:

http://combatcarry.com/vbulletin/showthread.php?t=17913

While looking for more videos on the subject, I found this video of TASERs in use (action starts at the 1 minute & 25th second of the video's timeline):

http://www.youtube.com/watch?v=GK8uNgK4Sno&search=TaZer

Be ready to have alternate plans when using TASERs.