“They call them a ‘pumpjack.’ You see them in oil fields. The look like a big metal rocking horse. They move slow and don’t seem like they would be that dangerous, but they are. I tried to ride one when I was 12. It mangled my foot and I’m lucky that’s all it did.”

Source: https://www.buzzfeed.com/larryfitzmaurice/reddit-shares-surprisingly-dangerous-things