If you have a big enough back yard, you too could build your own wood roller coaster just like Jeremy Reid has done.
Here are some other to have a look at:
Link 1
Link 2
Link 3
Video after the jump.

“Style: Out and Back
Height: 17 feet
First Drop: 20 feet
Top Speed: 20 mph
Track Length: 444 feet
Max Positive G’s: 3.5
Max Negative […]

More: continued here