Very cool lets see it done with a folder.
Should be a big hit in Japan too where sometimes people run full speed into packed subway cars in order to build up enough momentum to squeeze themselves in. I mean, if you think about it you really don't need a smaller folder if you can just put more force into cramming the one you got, right?
Here's one with 20" wheels and no suspension that's nearly as impressive (and I understand suspension helps a lot):
I came to say I must be folding . . .
Dahon Jetstream XP
Dahon Helios SL
— or not . . .
Fisher Mt. Tam (c.1988)
Merlin Road flat bar project
Schwinn Twinn Deluxe