How to Stack Empty Glasses into a Tower.

A neat little bar trick - how to make a tower of three empty glasses, stacked on top of each other:

Firstly the glasses should be empty and indentical.
Secret for successful trick: imagine a clock face when you look at the glasses from above, you must remember 10 o’clock and 2 o’clock!
Place your first glass down onto the table or bar.
Place the second glass on top of first glass in the position of 10 o’clock.
Now place the third glass on top of second glass in the position of 2 o’clock.

Link - Thanks Gigz!