I was reading the funnies here, and I came across this one:
A guy is at the check in counter for a flight. The lady tells him that the only seat availible is the co-pilot's seat, and that if he could fly a 747, then he could sit there. The guy goes, "Ummm...sure, I know how to fly a 747."
So then it shows 2 men in the cockpit, the guy is in the co-pilot seat. The guy asks, "So, should I do something captain?"
The other guy goes, "Beats me, I'm a chiropractor."