A couple of stories from Me Olde Daze -
VW Bugs had 4-speed sticks, then came out with the "automatic stickshift". This was a manual shift gearbox with a vacuum-servo clutch that activated when the stickshift was moved to shift gears. It had no clutch pedal, and a wider brake pedal as was common in cars with auto trans at the time.
I hopped into it, and when it was time to shift, per habit my left foot came down forcefully on the "clutch pedal" which wasn't there.
Pressed the wide brake pedal instead, locking the wheels. Surprise! Fortunately we were wearing seat belts and didn't launch our melons into the windshield.
Another time, in an old Bug I had, the ignition switch failed. Being a cheapskate, I set up a couple of house-style light switches in the cutout meant for the radio, one switch for the starter and one for the ignition. This worked well, but a neighborhood ne'er-do-well couldn't resist the easy steal. Once recovered near his house, I installed a proper switch.
My Vanagon Syncro Westphalia is a five-speed, the lowest being a granny gear not used in regular driving. Goes anywhere and gives good bed!