I was caught, many years ago. 78.94 in a 50. I was driving a 1988 ford fiesta 1.1 (hint you don't even get an engine that small in the USA, I think 1.6 is the smallest in a fiesta). So in a proper car? That's got to be easy.
That's not impressive. 120 in a 30 or there about is. Yes someone did that around here. As for the how? High powered car and a lead foot mixed with a need for speed or a death wish.