Reading about the burn pile remains reminds me of an experience I had this February...
I was clearing a lot I had purchased and had several stumps that I had set on a burn pile in the morning. So I burned everything real well and let it reduce overnight, next morning it was hotter than a two dollar pistol and needed to be trucked away, so I hosed them down with a garden hose for darn near 30 minutes, loaded them into the dump truck and off I went. About 20 minutes later I'm sitting at a stoplight in the dump truck and I see a bit of smoke coming out of the bed!! Had about a couple of larger wood pieces and stumps sitting in there that had reignited from the wind I guess... Got a lot of looks rolling through town. Made it back to the house and hosed it down, had no problems. Rolling firepit?