Ohhh man, how about when you spot your landing but you realize that you are still 90 degrees away from how you want to land? Yowzers.
yeah i hate that in the air but i think a worse "o shit feeling" would be looking at your arm or leg and seeing it bent the wrong way or seeing the bone out of the skin. The feeling when you know you got a season ender is the worst but i've never gotten one that nasty looking yet
my last oh shit felling was reaching in my jacket and fealing my broken collor bone
dropping into the pipe waaaaayyy too fast just before running into the transition on the other side (the halfpipe wher I ski isn't very big)......