You keep walking down the hallway trying doors. The gimmicks keep getting funnier that you don't stop laughing between doors anymore. The tingling inside your tail bone is growing more intense and only your having so much fun is keeping you from noticing. the soft lump in your pants is building to the point that you are starting to have a small bulge in that part of your pants.
"HAW HAW HAW HAW HAW HAW HAW HAW!" You keep laughing.
As you read one of the last three doors you suddenly feel and odd urge to bend over a bit an push your rear out behind you. When you do you open the door and see a picture of yourself with donkey ears 'painted' onto it. It strikes you as hilarious and you break out into a fir of laughter.
"HAW HAW HAW HAW HAW HAW HAW HAW HAAAW HEEEEE HAAAW HEE HAW!"
You hand jump to your mouth and you freeze in fear. You feel the twitching in your butt as your tail bone tries you turn backward and you get even more scared. You feel the urge to bend over slightly and push your rear back just then.