I really want to do a guerrilla ramp build with a little shoebox of quickcrete to make a smoothed out curb somewhere. And then spraypaint a little slogan on it to show that Radical Action for Wheelchairs was there. (I thought of a whole lot of other funny names and acronyms but they're in my other notebook.) This couldn't be a very big "ramp" or smoothing-out-of-a-bump, but I could shore it up with cardboard sides and a top until it sets. I have my eye on a couple of places that could use this treatment!