Most likely you'll hit one, and his 100lb bow with 800+ grain arrow couldn't penetrate an elephant's ribs. Chuck did a number of tests on the one they downed.
I have no personal experience in this, but I've heard from other "experts", that an 800 grain arrow is way too light to be going after elephants. I believe recommended draw weight is also higher. Like most things, there's a right way and a wrong way. No need to ban those who are capable of doing it the right way.