Modern small turbos can hit 330,000 rpm! Also some turbos in race use are traveling at .98 the speed of sound at the outermost edge of the turbine blade! while I was working at Garrett I saw a video of a truck turbo when a foreign object was let in - WOW or rather bang! Then the oil was pulled through thus removing all your engine oil in short order as well as a knackered turbo.... knackered engine!