My favorite keyboard was one that came with HP PC's ... in the late 90's I think. It had a split space bar. I think the deal was the right half of the space bar was the space bar and the left half was the backspace key.

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.