Pre-USB keyboards used a similarly horrific combination for Print Screen, which was also the only key that didn't report when it was released. This was for the same reason - the key was added after the keycode list was standardized.
Using it was like a magic trick. Words would just get a character truncated and merge. I could watch my fingers type and I would know what I had to do and my fingers would just merrily go on and do whatever they wanted.
There was some youtube video about a guy who set up a bike that had the turning backwards - you turned right and the front wheel went left. The funny part was that with a lot of effort the guy managed to teach himself to not be able to ride a normal bike.