The pirate says "ARRGGHH! It's drivin' me nuts."
Because he had no depth perception.
Arrr'n'B
A: An air bag.
There's no steering wheel in the back of the bus.
ARRGGHH" (R) Your response = (in a pirate voice of course) "You'd think it'd be the ARRGGHH but it actually be the SEA!!! (C)
The pirate responds: "Arr, its been drivin' me nuts."