Funny how the Internet operates. Treehugger wrote about the Trailcart, and then we and BoingBoing did as well. A BoingBoing reader thinks, hey, that's kind of like what my husband built, and mentions it in the comments. So then Treehugger writes about that homemade pedal/electric hybrid 4-wheeler. Now we're doing the same. We're so incestuous around here.