Scariest part of flying
How about unexpected loud noises of any description ? A few years ago I set off on a gliding cross country, but one of my gear doors failed to close when I raised the main wheel. It finally freed itself after 2 hours and snapped shut under bungee tension with a hell of a bang. Certainly woke me up and got the adrenaline running for the next 30 minutes. And how about the dubious privilege that glider pilots have of actually hearing the engine noise of that aircraft right in your blind spot - you crane your neck through 360 degrees and STILL can't find the b*gger - now THAT'S fear !
Cheers all
Pegpilot