D'OH!
Could be several of the largest dimocrat gas bags all exhaled at once in the parking garage, the fumes were ignited by a still-red-hot manifold.
Nadler, Frank, Waxman, Conyers, Shumer....
It could have only been one or two.
Had there been a crowd (herd?) of them, this would have been the result:
Noo-kya-ler, indeed!