The ones with the loops are perhaps the most unhinged. You are not a rollercoaster car, or a self-contained safety devices. Instead, more than a couple of the examples given here were closed or retooled to keep patrons from being injured, or even worse, dying. Last time we checked, your local playground doesn’t have anything do dangerous. Add water – or in one case, a skyscraper – and you’re looking at trouble. Tantalizing trouble.