This is another lateral thinking puzzle. Some of you have probably heard of this one before, but if you haven't it can be truely frustrating. Remember, I can only answer yes/no/irrelevent.

The Man in the Bar

A man walks into a bar and asks the barman for a glass of water. The barman pulls out a gun and points it at the man. The man says 'Thank you' and walks out.

Why?

Hic

If you're gonna give an answer then give a complete one please.

Yes, the man had hiccups and the barman noticed the hiccups when the man asked for water. The barman decided to scare the hiccups out of the man instead. It worked, so the man said thank you and walked out.

At eleven in the morning a man enters into a bar and asks for a glass of water. While the bartender turns to tap the water he takes a gun out and robs the bar.

Then at four in the afternoon another man enters into a bar and asks for a glass of water. While the bartender turns to tap the water he takes a gun out and robs the bar again.

The man of the puzzle enters at eight of the same day. He really wants a glass of water but the bartender is a bit fed up of that. So he pulls out the gun first and the man thinks "Doh! This bartender is a madman, I'm glad I did not ask for wine." but on the spur of the moment he only says "Thank you" and leaves.

Ok, some other lateral thinking?

That bartender must like robbing the patrons of the bar.

Actually the man formulates the question in a peculiar way and says: "It's boiling out there outside that even mosquitos have to take a nap. May I have a glass of water?"
Unfortunately, the bartender is a spy waiting another spy and this is just the pass-phrase he's been expecting.
BUT... the bartender is in fact a counter-spy so he takes out the gun to arrest the supposed spy and when the poor man tries to walk out he's shot dead.

The bartender is a magician.
He has one of those old guns with a "funnel" opening and has been working hard at his "glass of water from gun" production.
He finally has a chance to test it to a real audience so he turns and takes the gun to prepare the trick.
Unfortunately, the gimmick brokes when he's loading the glass! Improvising on the moment, he changes load and at the last second is able to fire at the customer one of those "BANG!" notices that says "Sorry, we only sell spirits here!"

The barman was just about to staple a notice to the back of the bar which read
"Due to a problem with the mains water patrons are asked to use the newly installed water cooler by the cigarette machine". He had the notice in one hand and a staple gun in the other he also had a few spare staples held in his mouth. The fellow walked in and asked his Q. The barman couldn't talk because of the staples in his mouth so he pointed to the water cooler( just behind his head) with his staple gun.