mattbrawn
When you think of roller coasters, you probably imagine massive theme parks rides that force you to queue for hours on end for that 90 second blast around the track.

Well this homemade coaster (sent in by a reader of Techeblog) is by far the best DIY effort I've ever seen - he's even got banked turns! Check the video to see how incredibly fast he's going, given it's in his backyard.
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24 comments // Homemade roller coaster goes fast, really fast

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