Riding coasters

Above is a front seat ride aboard the Twister at Noebels, Pennsylvania. It is a nice old wooden roller coaster. From there were head to Switzerland for two rides. The first is the Pradaschier Mountain Coaster in Churwalden which is a long ride down the side of a mountain. We then get off the rails to take a summer toboggan ride at Fräkigaudi on the Fräkmüntegg. Enjoy (if you don't get motion sickness from watching the videos). 

Backyard roller coasters

This is a 1989 film of a backyard roller coaster called The Termite. The ride starts off on the roof and then drops to ground level. If you search YouTube for backyard roller coaster there are a surprising number of people fiddling around with them. It is an odd hobby I wasn't aware of.

As you might expect, they've made some progress over the years. Below is a modern one called the Blue Flash that is motorized and features a loop.