Sex move. The woman will appear to be a "one-eyed dolphin". Having sex doggy style and the man surprises her by shifting gears and placing his penis into her ass. She will quickly turn and shriek--from your point of view she will appear from the side (one-eyed), the noise she will make will be similar to a dolphin.
"My friend Jimmy was giving it to his girlfriend from behind and without warning he slammed it into her ass. She turned quickly and yelped like Flipper! He said that she looked like a one-eyed dolphin."