The place of my nativity. Delaware has or at least used to have inspection lanes. There's one by the airport. You have to drive through the lanes, slam on the brakes, et cet. However, for old clunkers, I do not recall the guy putting the probe into the tail pipe. I drove a 1954 Packard convertible through the lanes back in the day with a 5 gallon gas jug in the front ...lol and it passed ... I've been gone for a number of years so not sure if the rules changed.