I had no idea I was doing it, and couldn't explain the bizarre behaviour until I literally looked at the keyboard, but apparently my left pinky finger is hoveri

I had no idea I was doing it, and couldn't explain the bizarre behaviour until I literally looked at the keyboard, but apparently my left pinky finger is hovering slightly above that area most of the time, and occasionally brushes it lightly enough that I don't even notice—but enough to trigger whatever behaviour is there (particularly irritating as a heavy vim user with a stuttering keyboard, who suddenly finds I'm unexpectedly in normal mode).