A game warden walks down to the lake to check on a man with a bucket
full of fish.

Warden: Excuse me sir, do you have a valid fishing license?

Man: No sir, these are all my pet fish.

Warden: Your pet fish? How's that?

Man: Well, you see warden, every night I take all my pet fish for a walk
to the lake, I let them swim for about a half hour and then I whistle
and they all come back and jump in my bucket and we go home. We do this
every night.

Warden: Well that's just a crock of lies!!

Man: Here I'll show you... (Releases the fish in the lake)

Warden: This I got to see!!

5 minutes later...

Warden: Well??

Man: Well what?

Warden: The fish!! I don't see your fish!! Where's all your pet fish??

Man: What fish??