Day 18 I awoke this morning to find out we had 20 minutes to clear out of our rooms and drive across the park. It wasn't because we were evacuated, but because our tickets for the only open cliff dwelling were earlier than expected. Sam rode with us in the back seat and we hightailed it across the park winding our way through mountainous hills and curves. Sam, who suffers some motion sickness, assured us he was feeling okay just as we approached the parking lot. Then he threw up. It's quite amazing how much hot chocolate an 8-year-old boy can hurl. We immediately pulled over, stripped him and wiped out the vomit. He felt bad, but he shouldn't have — he can't help it — we just felt badly for him. After all, nobody likes to throw up on themselves.