Basically, it's a bot holding a taser. If a guard sees you with a weapon out, it chases after you and tries to tase you. If you get tased, you get tumbled, and you lose something depending on a pref.
Avalible prefs:
Lose nothing - Just tumbles you, leaving whoever you were chasing time to forget off out of there A.K.A slap on the wrist mode
Lose currently held item - If you get tazed, you lose what you were holding.
Lose random item - You lose one random item from your inventory.
Lose everything - Hardcore mode.
Die - Those are some strong tazers... Super hardcore mode.