When you look at your behind, you find that there's nothing there! The bump has gone, and everything feels normal. Dishevled, you reckon you were just imagining things.
After the ride ends, you spend the rest of the day having fun, before leaving the park and going home.
Little do you know, the seat you sat in was cursed. The curse started to manifest itself, but the high level of adrenalin in your body suppressed it. Once you find yourself relaxed, it will kick in, causing you to feel really good in a sensual (but not sexual) way. Then the tail will start to grow once more, making you feel even better!
The next morning, you wake up, feeling really good. Of course, now the curse is ready to strike and make you grow a...