Build Your Own Carnival Ride
SoCalChris writes "Check out these guys who are building their own dark ride similar to the ones found at carnivals and theme parks. The ride is complete with PLC's in each of the cars, and one more PLC for the entire ride. The ride also features a blocking system like professionally built rides."
Here is the entry in the official Slashdot FAQ that answers your question.
Yes, it's been suggested before. And yes, it's off-topic. But there are enough newer Slashdot members around right now that are posting this idea (and then modding it up) that it's time to link to the FAQ again.