-1 large mason jar or glass
Optional (but recommended) material:
Step 1: Putting the egg in a Jar.
Step 2: Adding the vinegar
The egg should not float. if it does, it means it's spoiled, and you probably want a new egg.
After all, why would you want to de-shell a rotten egg? It would smell terrible...
Step 3: Watch and wait.
Step 4: Marvel at it's nakedness.
After a while, your egg should be totally shell-less. but in order to really enjoy it, you need to drain it. take the spoon (or your fingers, for you stubborn people) and hold the egg back as you pour out the vinegar. then just lift it out of the jar.
Step 5: Enjoy!
okay, I was just kidding about throwing it at a random pedestrian.
I can't condone that.
Another fun Idea is to show it to someone, and give them an unshelled egg. then ask them to try to do it themselves. 9 times out of ten, theyll try to pick of the shell off with their hands, and it will burst all over their hands.