I learned this trick to shelling an egg from a shepherd in Kyrgyzstan.
Step 1: Tap 1
Tap the first side against a hard surface to make a small crack.
Step 2: Peel 1
Peel a few fragments off the end to make a round opening.
Step 3: Tap 2
Tap the other side against a hard surface to make another small crack.
Step 4: Peel 2
Peel a few fragments off the other end to make another round opening.
Step 5: Blow
Place your lips around one hole and blow. The egg should pop right out leaving the shell behind.
Step 6: Peeled Egg