A man walks into a bar and immediately falls unconscious. Why?

Question

A man walks into a bar and says: Give me today's special. The bartender says: In a shot or a bottle? The man says: In a shot. The bartender gives it to him. He drinks it and then he dies. Why did he die?

Answer 1

Here bar mentioned is a physical support structure not a place where people consume alcohol.
Bumping ones head on it can make one unconscious.