Even if you're not a muscle-bound body builder, you can impress your friends and maybe even win a few bets by learning to bend a beer cap backwards using only your hands. This feat is a popular bar trick that leaves many observers scratching their heads. The secret behind this trick lies in the grip that you use, as well as the motion that you employ while performing the trick. With a little time and practice, you can learn to bend beer caps and amaze those around you.
Place the second and third knuckles of your index fingers together with your thumbs facing upward.
Center the bottle cap on top of your index fingers with the crimped side of the cap facing downward toward your fingers.
Place the tips of your thumbs on top of the bottle cap.
Press downward with your thumbs as you twist your right hand downward and your left hand upward. Keep the knuckles of your index fingers together the entire time, so you are pressing the knuckles inward as you pivot your hands. This should crease the bottle cap.
Grip the cap in one hand between your thumb and index finger and complete the bend as far as possible.