Crazy 1930/40s bike inventions

http://youtu.be/jdlpJqHxLxk

Look at that tandem where one rider is cycling normally and the other is in a 'bent position sitting right over the bars (about 14 seconds in, and you see them riding later).

In the second segment, the crazy old dude is saying to the chick, "It's like this, dear all you have to do is make sure the pedals are flat then step onto this 50" wheel like so...".

I like the crazy race where some sprinter is towed in a trailer by tandem riders and has to leap out at checkpoints along the way and get a stamp or something.

Then 4m30s in... is that a bike with a sewing machine stand built in? Seriously... W-T-F!?