The flame will quickly go out, and when it does, don't blink! Your egg should start to compress and will get sucked down into the bottle. Ta-da! You've successfully managed to get your egg in the bottle. So what's happening? As the flame burns inside the bottle, it heats up the air around it, causing it to expand. If you saw your egg vibrating slightly, this was because the air was escaping from the bottle. When the flame goes out, the air in the bottle cools and shrinks. This is what sucks your egg into the bottle! To get your egg out of the bottle, simply cut it into a couple of smaller chunks by poking it with a knife. Then tip the jar to dump out the pieces.