Nigerian shoulder pads
When a man sneaks up behind an unsuspecting victim and calmly rests his nutsack upon the victim's shoulder. Properly executed Nigerian shoulder pads result in the slow turning of the victim's head, followed by a double take, followed by either anger, disgust, or cautious acceptance.
I was thoroughly enjoying my meal at Outback Steakhouse when I realized that the waiter had outfitted me with a pair of Nigerian shoulder pads.