Sub

[Seafood]

A general, inspecting troops, stops in front of a private and says, "There is a submarine surfacing in front of you. How will you deal with it?"
Private: I'd wait till it's 20 meters up in the air and shoot it with my anti-aircraft gun SIR.
General: And where are you going to get an anti-aircraft gun from?
Private: Same place that you got the submarine from SIR.