I did for the first time today. :-/ I felt guilty about it afterward because it obviously wasn't great on my FE or potentially the car. I really couldn't resist though. This idiot behind me was laying on his horn when I was going the speed limit on my way up to a red light. So of course he finally speeds around me and when I finally pull up beside him I put it in power. Green light and I pretty much floor it. His Lexus SUV looked pretty stupid getting owned by a Prius. Cool thing was when I get home from the 9 mile trip the MPG was still 85. I know, I know, pretty immature, oh well. Anyone have similar stories?