Aha, insight.

My wife and I were in Cambridge this morning and had to walk from the Kendall T station down to the Middlesex Probate court. This is the heart of the biotechnology sector here and so, as Spring follows Winter, we saw a Segway rider.

All of a sudden I figured-out what it is that makes Segway riders look ridiculous:

It is the flapping of pant legs in the breeze.