What If? with an Ozzy ending

Okay, this one's a little weird and from very far out in left field, but it should be worth it in the end. The great online comic xkcd has a column where you can write in with your random questions, and they'll attempt to answer them. Someone ask, "Is it possible to actually catch a bullet?" There are some interesting results, but the Ozzy bit is right at the very end. So go take a look, and then realize that there are people who can tie The Wizard of Oz into just about anything!