Every buy a Jeep that'd been parked under a hardwood tree for years and years? When I saw green sprouts popping from the cowl of my '78 Cherokee I thought I'd better do some cleaning.
I shot this photo a couple weeks after I bought the rig while in the middle of rewiring it. The cowl was packed solid with leaves and gunk. Most had turned into a super mulch soil like consistency and any little seed that landed on it sprouted and started growing nicely.
Not the nastiest thing I've ever found, but comical nonetheless.