The Airbii shake so much on takeoff that I actually pray... just in case.
Of course, on US Boeing aircraft I pray that the dirt doesn't get me sick...
On NWA's DC-9s I pray that the plane has had fewer birthdays than I have...
And on any RJ I pray that the pilot isn't being worked to death so that s/he makes it through the flight...
I found religion in flying!!!
It's been a long time since I've ridden an old HP 757, but they used to have one where the engine noise was so loud that even while cruising you could not hear the FA talking in your ear... now THAT was some disturbing noise