I was thinking of how there seems to be a lot of mention of things we can't do because we aren't tetronians. But there are some things relatively easy for us to do that would be very difficult for the average tetranian to do.
For example, just as it takes great skill to walk on a tightrope for us, it would take a great deal of skill for a tetronian to walk on a "tight sheet" or 2-d plane.
I wonder if this means balance is generally harder in the dimensions. I mean, bionians walk on lines all the time, and and a unian (1d guy) would have no trouble balancing on a point.