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!