Unclear on the "accident" aspect.
I really did have an accident grow once. I had run my car off the road and into a water channel at the side. Car got soaked n the drivers side, all the way up to the tranny hump. There obviously were seeds in the car, in the carpet, from cleaning and one seed at the door area, down at the floor where the carpet ends SPROUTED! Unbelieveable to say the least. When I got my car out, there it was, all of 2-3" tall. No, I didn't let it grow out, besides I was too stunned to believe it. I did take picture but that was back in about 1974-5 and haven't a clue where it is. If I ever find that pix, I'll certainly post it just for laughs...