Why am I able to go on rollercoasters and drop rides with no problem...?

rollercoasters you get an adrenaline rush, same with drop rides .. your still scared but you love them at the same time whereas a ferris wheel is jus slow and boring .. and can reach large height and because its slow you actually realize how far up you are and immediately want off it. but when your on a rollercoaster you dont realize the heights because of the speed