In this case more of a decompression valve.That induces leaky valves.
Paul
I had a Harley riding acquaintance back in the 70s who played that game as well.In this case more of a decompression valve.
By the way - when we were young, we watched the first TV program "Rockpalast" with several friends at night in 1977, in which the brilliant Rory Gallagher also appeared. At around 2 a.m., my friend Jürgen wanted to test whether a fart really burns.
The jet of flame was impressive, and the result was a shaved butt. I wouldn't recommend anyone to try it again.
Thomas aus LAU