stinger_sweaty

Hi folks, my car yesterday while i was inside it i revved the car to 2k rpm and the car was vibrating quite bad, wierd thing is it only does this around the 2k rpm mark it dosent do it anywhere else in the rev range, the vibration isnt as bad while im driving its only very slightly, but when stationary it vibrates badly, anyone got a clue what this might be?

thanx den.