When you're doing a girl from behind, and switch with your friend halfway through without her noticing. (aka
The Magic Trick, but your friend is acting as your sidekick)
You go stand near the open window in front of them, spank it until you cum, then “Spiderman” her in the eye, as your friend kicks her in the shin. Turning her into
the angry hulk/pirate.
Your friend then proceeds to perform an
Angry Dragon on her, while declaring “Justice Has Been Served!”