Here is a video clip from a longer video which features a VW Beetle with a jet engine built into the back. In the longer version of the video the guy explains some of the construction and things like the extra fuel nozzle which causes the flames that you see in this video. In this video they have the VW Beetle with it's brakes on and the guy fires up the jet engine for the cameras. It blows out a pretty good gout of flame and smoke but other then that it doesn't do much. In the longer video I think they drive it down a road with the jet engine fired up. Reminds me of the urban legend of the guy that strapped a jet engine to his car and slammed it into a cliff. This guy just hasn't crashed it yet.

Check out the full video of the VW Beetle with a jet engine built into the back below or click over and view it on the host site.

Source: YouTube