Japan is going back to the future, with a new approach to 
amusement park rides that might transition into the post Peak Oil world. Thanks to Treehugger for the tipper about Japan’s pedal-powered roller coaster.
The Sky Cycle clearly is set in magnificent scenary.
Traditionally, seems that we fear that roller coasts might kill via a heart attack from fear. In the Post-Peak Oil world (and Japan today), those heart attacks might come form over exertion.
Note: Thanks to Grist and EcoGeek for the tip.