The act of, while alone on a dark and stormy night, sitting on both hands until they go numb. After numbness has reached its peak, remove hands from underneath the buttox, and place one on your erect penis, performing masturbation while the other is placed on your throat, attempting to block your air passage. This simulates a stranger attemptig to pleasure and harm you at the same time, sending many mixed signals.
Johnny attempted the homicidal stranger last night and went a little too far.