Bright idea ?

[Gringo]

Somewhere between sane & insane is unsane
This is my Unsane idea for a spare seat-post & handlebars









To create a stable upside down bike while I'm changing wheels
Also keeps my saddle out of the dirt

 

[flecc]

Here's a perhaps more practical way I use on one of my e-bikes Gringo, the carrier being the rear support as you'll read:

Link

 

[Aushiker]

Certainly a different approach that is for sure I would suggest using a bit of plastic tarpaulin or the like. Lighter and quicker

Andrew