Fun story. A friend of mine (Eric Engstrom!) bought himself a backhoe. I'd never driven one before and he offered to let me drive it. Sure!

The clutch pedal works backwards from that in a car. Press on the clutch to engage it, release the pedal to disengage it. After some struggling with my reflexes being all wrong, I came within a couple feet of taking out the side of his barn - by switching off the key.

There was nothing wrong with that user interface, other than being insane.

I always use brackets too. That's simply a less error-prone style.