Make tower with glasses!

This is my favorite trick when I go to the bar.

How to balance 3 empty glasses on top of each other on their outer rims, without the help of any other object whatsoever?

Well, here is answer for that question! 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.

Cheers!!