Bob is scared of heights, yet he finds himself at an amusement park perched on the top of the roller coaster. On the way up the first hill, Bob is terrified for his safety. On the way down the first hill, he is still terrified, but less so. He ends up riding the roller coaster several times that day and finds himself relieved, happy, and enjoying the ride by the end of the day.
Which theory of emotion explains this experience?