Think you don't need a kill switch?
 

This dude wishes his kill switch had worked.
http://www.liveleak.com/view?i=1e1_1418736765

WHooo buddy!!!! I'd have been one P O'd mofo for a jerk twistin my throttle and causing that to happen to me. I might have needed to do something about that...... with due haste & without prejudice.