Trampoline Exercise Class Riding Horses gif
Adam Rifkin stashed this in Trampoline!
Imgur comments: http://imgur.com/KTKEAhr
OMG PWNIES !!!
Context for this gif:
This is great! (horse video), not enthusiastic girl above!
The enthusiastic girl is the elf in Lord of the Rings explaining how she makes like she's riding a pony when actually they're filming her on the back of a truck.
It just goes to show that the motion of riding a horse shows up in many places...