The seal - When you are banging a hoe from behind, reach down over her face, using to fingers as hooks, grab her nose and pull up. With no place to go, she will swing her arms and sound like a seal as she is saying uhuh, uhuh, uhuh
A SEAL is a highly-trained special forces soldier of the US Navy. Part of a group of 2, 4, 8, or no higher than 16 other SEAL's, Navy SEAL's are pretty much the modern-day ninja; they are trained to meld in with the scenery and attack without being noticed. Their bodies are trained and pushed beyond almost human-limits.
"Not everyone can be a SEAL. In fact, you'd have to be superhuman to be one! If you really want to be a SEAL, you really have to want it."
When he is lying on his stomach and you kiss softly down his back, then as you work your way down, you fist his asshole and the other girl who happens to be there watching slaps him in the face with a fish as he says “aurghh!”
As with planking, sealing refers to the act of spontaneously and often inconveniently laying on the ground. However, when sealing, one must support their upper body on straight arms, and look to the sky.