The last time I was flying a small plane a deer ran across the runway right in front of us and we cleared it by 10 feet or so. I almost had a heart attack.
A funny one from my dad back in the college days was that a pair of his friends (fellow MIT nerds) decided to annoy the stewardess(propper name back then) so one of them started acting like he was a robot and the friend told the stewardess he was a a robot. she told them to sit down, friend told her he hada bomb in him and couldn't. stewardess told the pilot and then they dumped fuel landed it and the friends got to have a nice long heart to heart with the police.