Unispins on a giraffe are posible and have been done, I dont know where I saw them though. A crankflip on a coker would be cool I have been thinking about doing them on my KH29 but have never got around to it, I have tried pretty much every other (pretty simple) trick on it.
Sideways ww on a 3 wheeled giraffe would be intresting, or if you had a flatcrown fork on a standard girafe you could maybe stand on that and pedal with your hands.
In one of this years Fluck videos a guy does a 360 unispin in his giraffe, i’ll find it and post the link later. I would like to see a backsomersault on a unicycle, launch off a ramp and do it like bmxers can do. It’s totally impossible i know but it would be cool to see. Theres somebody who did a backflip in his wheelchair aswell that was amazing!!