A rock climber at the Grand Canyon fell about 90 feet on Sunday,Landed at the bottom of a "slot canyon," which is like a cave and somehow didn't even get hurt.He posted GoPro footage, and it looks like he bounced off the walls a few times, which probably slowed him down. Then he starts moaning after he lands. But a few seconds later, he yells up to his friend that he's okay.He went to the emergency room after he hiked back to his car, and they did a full-body CAT-scan. But he was fine, and they couldn't even find a scratch on him.Warning: S-word at :17, and possible F-word at :56He falls at :10, and yells that he's okay at :36.