How do you drop a real egg on a concrete floor without breaking it?

If that's a riddle, then the answer is:

Any way you want! However you drop the egg, you won't break the concrete floor!! Hey, it doesn't say "without breaking THE EGG"!!!!! :D

But if that's NOT a riddle, which it probably is, you would have to hold the egg REALLY LOW, and I mean REALLY, and then drop it. Or, you could try wrapping the egg with stuff like bubble wrap, or putting a carpet on the concrete floor.

But, usually this is just a funny joke! :)