A gnat jumps on the back of a fly.
Fly: Is that a gnat on my back?
Gnat: Gnat at all.
Fly: What an awful pun.
Gnat: I made it up on the fly.
A gnat jumps on the back of a fly.
Fly: Is that a gnat on my back?
Gnat: Gnat at all.
Fly: What an awful pun.
Gnat: I made it up on the fly.