[CalRobert]

For nerdiness there’s also the bike sat-r-day, a folding recumbent! http://cycle.atnak.com/SatRDay/index_e.html

[jodrellblank]

The ICE Trice is a folding recumbent tadpole trike! https://i.pinimg.com/originals/d9/85/10/d98510f35c1aa63b8384...

It folds the rear wheel “triangle” (red in the picture) underneath to make it shorter to fit in a car trunk, and quick-releases the seat IIRC. Also has squishy rubber-lump suspension because the rear wheel pivots.

(ICE being Inspired Cycle Engineering in this context).