Now that it's getting cold my wife never wants to ride the tandem with me, so I made myself a friend. I took him to critical mass with me on Friday:
He had to wait outside when we stopped at the tea room. Apparently they don't serve "his kind" there.
It was still fun though, here's a video of us riding down some stairs in a shopping mall.
His knees kept bending the wrong way, but pedaled pretty well considering he is made of Huffys and has inner tubes for tendons.