Waiting in a long line to ride a roller coaster, I considered turning back several times. When it was finally my turn to board, the safety bar in the seat I was to occupy wouldn’t release properly. I was afraid of getting stuck, but I hopped in anyway. When the safety bar came down too tightly on my lap, I felt trapped and scared! I considered waving my hand and asking to be excused from the ride. But an attendant announced over the loudspeaker, “You can scream and you can shout, but there’s no way we’ll let you out.”