This bartender managed to balance 3 pints of Guinness on top of each other! (The fourth glass, however, didn't work).
Link - Thanks Justin Hourigan!
A little Google search revealed the secret behind this pretty neat trick.
the title says 'balacing'
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Thanks Morgan - fixed now.
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Great bar trick. If one picks the right shape glasses and is allowed to have variable amounts of beer in them, I think four would be possible.
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