I don't know how many people this would apply to, but I learned an important lesson today. I was driving my E Revo at a BMX track which is built in the area where the volcanic ash from Mount St. Helens was deposited after being dredged out of the river. The ash feels kind of sandy, but is extremely fine and sticks to everything. It caused a bearing to seize, which led to breaking an axle. If you ever have the chance to drive your vehicle on a recently active volcano, I would recommend against it.