Up in smoke
Recently my friend Ken and I were on our way to a kayaking session when our route was blocked by a horse box that had pulled over to the side of the road ahead off us. There was some black smoke issuing from under the bonnet. The driver had already jumped down from the cab.
...and moments after that the whole vehicle was on fire with black smoke billowing into the sky
Scary though it was, it could have been a lot worse. Thankfully the driver was out in good time (though coughing and spluttering); there were no horses on board at the time; and the country road was quiet at that time of day - it might have been in a crowded city centre.