My ideas on the pic :

-It probably was to save time in case his flying buddy made another of its terrifiying, eye-level speed passes...
-"I call this maneuver the Black Hole... Why? Stop looking the plane, it has nothing to do with it!"
-Those diet pills really seem to work!
-"I'm showing my crack? Yeah, I know and I'm proud of it! Of course! I'm a plumber"
-It seems the food he ate didn't cause him any good and he's not sure about the time he can have his esphinter fully closed.
-"hey Joe, do you mind if you hold my transmitter while I.... Well, if you don't mind we can always do it the opposite way, I just can't stand touching "that thing" with my bare hands!"
-Pros competition tip! Let your crack go to public domain to make the other competitors loose their confidence.
-I'll pick that thing of the floor for you but please, don't bend your torso! No please, stop! STOP! WAAAAAAAAAAAAAGH I won't sleep alone again ever!
-Wonder what's on the other side... Provided this is the dark side of the moon.
-"I must really be a heck of a pilot, everyone in the field has stopped making noise since I've parked my car".