There's a guy around here, PPL, with a Navajo painted black. The guy comes to our home field for breakkie or coffee from time to time, usually with some bird in tow.
He just hops, in, fires both up, taxies straight out, and blasts off. I've seen him at several local airfields and have never known him to do a run-up. Not even mag checks on the fly.
I just know he's going to get a big bite on the arse some day. One hopes it won't be fatal but will teach him something valuable about flying.