brace position
The position assumed by passengers of an aircraft in danger of an imminent collision or emergency landing as announced over the cabin’s public announcement system - occasionally adopted during a particularly disquieting visit to the toilet to dispatch a no.2 when someone is required to bow their head and grip something nearby or put one or both hands up against the wall.
Oh man, that curry really carved my guts up, last night. I had to assume the brace position just now.