Robin Williams is a very strong rider, from what I have heard.

I have been told by many people that he was here filming a movie several years ago and he participated in most of the fast rides.

One friend of mine, who had just moved here, ended up riding with him briefly. According to my buddy, they reached a stop light, at which point my friend said, "I"m new here and I"m not used to riding these hills and I'm not exactly sure where my house is." To which Robin replied: "Well, I'm from San Francisco, so the hills aren't a problem for me. And I don't know where you live either."

After that, the light turned green and they rode their separate ways.