When John Ivers got sick of waiting hours upon hours in line to ride 30 second roller coasters at amusement parks, he decided to take the matter into his own hands and build his own homemade roller coaster called Blue Flash. Blue Flash isn’t some run-of-the-mill roller coaster either, it’s perfectly safe and even has a 360 degree loop. This roller coaster makes for some awesome backyard fun.
Link:
Blue Flash: Homemade Roller Coaster | Offbeat Earth 
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