@gschenk I found an article where Vittoria said as much. They said at the start they had no idea what they were doing and the results were not good at all. They tried to mix the graphene in a powder form with the rubber and just ended up with lumpy rubber :P
Yeah - its slow speed, they're all padded, and I know the christchurch ones used cardboard tubes as lances, which generally buckled to uselessness on the first hit.
I've ridden a tall bike once. It was terrifying to get moving, but okay once you got above ~5 km/h. Stopping was even worse - you have to stop within range of your chosen streetlight or wall or whatever.
Tim's one, you could put your foot on top of a portaloo or on a van's roof while in the saddle.