$50 Backyard Rollercoaster

http://hackadaycom.files.wordpress.c...pg?w=580&h=435
This is great. What happens when you bet a group of friends they can’t build a roller coaster in their backyard for under $50? They build one.
They built it almost entirely out of old forklift pallets, some wood from Home Depot, assorted nails and screws, some caster wheels and a folding seat from an old arena. It was built in just over 9 hours by three people. Once assembled they tested it with a 15lb cinder block — safety first right? The cinder block survived the ride, and by that logic, a 160lb+ person should be fine as well!
Well… they were right! To finish it up and get into the holiday spirit they also decked it out in Christmas lights and let the neighborhood kids use it all night. The total came to $49.27 from Home Depot for the wood and wheels.
Stick around after the break to see a .GIF of it in action!

http://hackaday.com/2013/12/08/50-ba...rollercoaster/