This isn't really ingenuity, but I had a POS pickup one time that had so much permenant dirt in the cracks between the body and bumper, as well as in the bed that I had plants growing out of them. I kept them and even watered them at times.
Same rig had a rusted out hole in the floorboard to spit Cope juice through. I may have even pissed out of the floorboard hole once while driving. There may or may not have also been some bullet holes in the hood and tailgate. Parallax is a bitch.
