One I heard a while back...
Requirements:
Pub location,
Two Pints of miscellaneous Beverage
A victim.
Bunch of Mates in on the joke.

Whilst sitting at a table, tell the victim that you would like to show them a trick but it requires him/her to be involved. Tell him/her to place their hands palm down on the table as flat as possible.

Now place one full pint glass on the back of each of the victim's hands telling them that they will need to concentrate on keeping their hands as flat as possible otherwise they will spill the drinks.

Then you and your mates leave the pub...

Length? As long as you please, minutes? hours?
(stubbledchin, Tue 18 Dec 2007, 12:37, 6 replies)

would it be
absolutely impossible to ask another person in the pub to help out removing the glasses - perhaps offering them for free? Or can only stupid people play this game?
(frankspencer, Tue 18 Dec 2007, 12:49, closed)

.
Frank: if someone in your local was sat with his hands on the bar and a full pint on the back of each, he looked over at you and asked for your help, would you help or laugh?
(misanthrope is so adjective he's verbing nouns!, Tue 18 Dec 2007, 14:04, closed)

Do you also tie their head/mouth to a wall
..or are they very stupid?
(EssY, Tue 18 Dec 2007, 17:07, closed)

Do you also put a neck brace on them?
Otherwise they could simply lean their head forward and pick up a pint with their teeth, put it down on the bar and then use the free hand to completely extricate themselves from their predicament.
( Bob Todd whee, Wed 19 Dec 2007, 0:02, closed)

Be better if you rang them when you left the pub
But yeah, easy to get out of
( Methylene Blue - electrohead, Wed 19 Dec 2007, 3:01, closed)

Even...
If it is extremely easy to get out of, still would be entertaining to stand just out of view for the 5 minutes of 'Hang on, something's not right here' and watching the cogs click in their brain.
( Agnostic Antichrist Baltimora, Wed 19 Dec 2007, 12:17, closed)