Hate them. Hate them with a passion. Nothing worse.
As a kid, I went on a roller coaster -an ancient, mole hill coaster compared to today's monsters. The first climb up wasn't so bad, but that first downward flight struck me with pure terror. -And all I could see was 'hills, hills, and more hills' off in the distance.
Never again.
Feet firmly planted on the ground. (I don't even like climbing a ladder.)