I made this one up myself just now.
Stephen Hawking would be a good pilot because the aircraft would be the first to take off and land in autopilot.
Hawking the Pilot
Explanation
Explain Bear
Listen up, buttercup. The joke is that Stephen Hawking, who used a wheelchair and computer to speak, would be the perfect pilot because his plane would fly itself. It's funny 'cause he can't fly a plane himself, get it? He's just too disabled! Someone like you would probably crash!