Stalin is giving a speech in a small auditorium. During a pause, someone
in the audience sneezes. Looking up, Stalin asks,

Who sneezed?

Noone answers. Stalin orders the guards to escort the last three rows of
people outside, where they are executed. Stalin then asks,

Now, who sneezed?

Again, noone answers. Again, Stalin orders the guards to escort the last
three rows outside. Shots are heard. Again, Stalin asks,

Now! Who sneezed??

A small, bespectacled man in the second row raises his hand and says,

Um, I did, comrade.

To which Stalin replies,

Bless you.

… and then continues his speech.