Here is how you know for sure that it has been way too long since you cleaned out the bed of your pickup:
At first I thought that someone had thrown a plant in there. But no, that's a big-ass weed growing in the busted up bags of soil in the bed of that truck. Those bags have been like that so long that a dandelion seed blew in there and sprouted! And is now huge!
Time to clean, man.
Hope he doesn't get busted for having a bag of weed in his truck.