AND NOW, yet another annoying story from the old days.
My first Mopar, around 1971 ish, was a 69 RR 4 speed, 383. At some point I had installed a "pizza pie" air filter. I cannot find a photo. These were sorta like a filter bottom plate, shaped like a very flat velocity stack, and used a flat oiled foam filter. And a VERY SHORT STUD
One day I was somewhere, in traffic, aimlessly blipped the throttle, and it came up like it was on the fast idle cam. I kicked the pedal a few times and it idled back down. What I DID NOT KNOW is, that the very short stud had vibrated out, gotten caught in one throttle butterfly, holding it open. When I kicked at it, the stud fell right through and about 1.385 milliseconds later, "kachunck kachunk kachunk!!! as the valve and piston ate the stud!!!!