Probably figure that he was better off as far as he could get away from thinking about what the jet engine was going to do sucking crap up from the ground, runway and anything close to it.
The turbine blades can cut the aircraft in half if they fail: shock: It's way better to be as far as you can get from it while it self destructs
The other thing to think of is how would he get out of the cockpit onto the ground safely