Penguins CAN'T Fly!

When Frank and Eleanor get on a rickety airplane, Frank decides to go into the cockpit to see if the pilot can fly smoother. Upon entering, he discovers the pilot is a penguin...who has been drinking. However, he then realizes outloud that penguins are unable to fly. The moment he says this, the plane nosedives into a crash.

Example of:
Puff of Logic