You can ride them on flat or down a hill, going uphill really sucks though. A bc can go alot faster than a trials uni but it depends how comfortable you are on it. I ride mine like a skateboard, push off to get going then when I start to slow down I start pushing again. I don't think its that practical for transportation, I have ridden mine places and it seems like I was walking for alot of it, it depends though if the place you are going to is downhill all the way then yeah it will be really fast and stuff but on the way back you will be walking.
I think we could just apply the same cure we use for bread, to humans. just scrape off the cancer with a butter knife, then put jelly on it, and eat it...mmmmmm