A airline pilot and hotel guest were drinking in the hotel bar. Being a friendly sort the airline pilot asks, "whaddayoudo?" and the hotel guest explains that he's an inventor - in town to sell his latest gizmo.

Airline pilot: "Really?"

Inventor: "Yes sir! It's an anti-gravity belt"

Airline pilot: "Now wait a minute - I'm a graduate of the Air Force Academy, fly F-16's with the California Air National Guard and I'm an FAA certified Air Transport Pilot and there ain't no such thing as an anti-gravity belt!"

Inventor: "Well; sir, how about we go to the roof and I'll jump off?" They proceed to the roof and the inventor demonstrates his anti-gravity belt - twice. Both times he floats back up and gently steps onto the roof.

Airline pilot: "My gawd! This is freaking incredible! It'll make airplane travel absolutely safe. Can I try it?"

The airline pilot jumps. A red splat marks his landing on the sidewalk below. The inventor returns to the bar.

Bartender: "Where's your buddy? Another jumper?"

Inventor: "Yup ..."

Bartender: "You know; when you drink, you've got a real sick sense of humor, Superman."