Ahhh Hot Saws as we call them.
I grew up in a small town in Washington, where logging was the main profession. Every June there is a log show, something similar to a rodeo but for logging skills. They have about 15 of these show up every year and they are pretty impressive. I have to favorites, the Binford 9000, and then there is a turbo charged, nitrous shot honda 4 cylinder. The nitrod one is really impressive when it purges its tanks, and the Binford is a big Buick V-8 with a blower on top. Fun to watch, bout loud as hell.