I got up and looked out the window but couldn’t see anything. We found it in the morning though; that “woomp!” must have been the petrol tank going up and blowing out the windows.
As The Wife pointed out, it looked theatrical, as though a team of set designers had been given the task of creating a “burnt-out car” scene for a low-budget telly drama.
Strangely, there was no smell whatsoever of burnt rubber or plastic or metal. However, the ever-responsible Jambo spotted an ember that the fire brigade had missed, and so he did the right thing.