When we were in Vietnam, we stumbled upon a rollercoaster like none we had ever seen before, the Coaster Bob. The Coaster Bob is a rollercoaster that you control yourself!
You just observe the easy-to-follow directions on the sign along the track & away you go!
We decided that since nothing was stopping us from ramming full speed into each other, Coaster Bobs would never be allowed into safety conscious North America.
So we took the chance to enjoy them while we could!