For those who don't know, "Six Flags" is the name of a number of amusement parks here in the US (and probably in some other parts of the world as well).
This is a rather cute study of the mechanics at a Six Flags park. Of course, it mainly deals with rollercoaster dynamics (and a vertical drop). But at least there is real data being gathered here. I often wonder if those class trips under the guise of a physics outing actually have any meaningful and educational values. Now, if the kids could do something like this, that's a different matter.