i loved his windshield wipers in that scene in candidate! hysterical!!
and then of course there is the vito scotti scene...pure comedy genius and timing.
I watched that one last night too, but what always got to me was that a gas station mechanic would allow a perfect stranger to "borrow" a truck like that to do some running around while his car was being repaired. I mean, Columbo didn't reveal the fact that he was an LA cop until it was time to pay!