Required Items:  One empty* bottle of beer and one quarter.

Set-Up:  Stand bottle on the bar and place the quarter on the side of the bottle with your index finger.

Challenge:  Using only one finger, slide the quarter to the top of the bottle resting the quarter on the mouth of the bottle. 

Rule:  Bar-Fly may not tip the bottle over, hold onto the bottle with their other hand, or remove the quarter from the side at any time.

Solution: Must be relatively quick and constant pressure to the quarter (may help if finger is licked).  Takes practice.

*Pro Tip: If you turn this into a competition and you want an unfair advantage, make sure your bottle is full and your opponents empty!