Hi, guys… have a question… purely from a technical point of view. I was in Hohenstein-Ernstthal last year for the motorcycle race. In the annual “war games” taking place on the campground, I saw some guys, who have lured out of the exhaust of some streetfighters a 4 m long stab flame and put the under full throttle to the 3 minutes into the night sky. I have never seen anything like that, how do they do the ? Greetings Czensie TRX 850 320i