Pedal Powered . . . Roller Coaster
I found this on Dvorak.org/blog - a roller coaster for cyclists (with details on treehugger.com). Surely this looks like the scariest roller coaster in the world. You can see the thte ‘bikes’ have been designed with practicality in mind - they even have shopping baskets.
I just hope that the ‘bikes’ have a freewheel, rather than a ‘fixie’ setup!