Just thought of a story about 50 years old or more, supposedly true, about a lady who brought her car into a garage, saying that it ran very poorly, kept stalling and could hardly get out of its own way. The mechanic took it for a test run, and it seemed to run fine. He gave her the car keys back, saying "It seems fine to me, no charge." She got in and drove away but was back in five minutes. 'It's still running just awful. Would you ride with me around the block and I'll show you." Quizzically, the mechanic got in the front seat beside her and she too entered the car. Then she pulled out a knob on the dashboard and hung her purse strap on it. It caught the mechanic's eye, and he asked "Do you always hang your purse on the dash like that ?" "Just the last few days...I found it's a really handy little hook to hang my purse on, so it's out of the way."
"Lady, that knob pulls out the choke" he muttered.