I saw this happen many moons ago with an old bread tie and a 9V tossed into a kitchen junk drawer.
Fortunately, the 9V was old and nearly dead, so the bread tie turned red-hot for about a second then it was over. 9V batteries are such a completely **** design...
Of course, other batteries can do the same thing, but at least on AAA, AA, C & D batteries the terminals are not sticking way out right next to each other.
It's also way too easy to accidentally bridge a button battery. Fortunately, they don't contain enough energy to cause more than a flash of heat, but they certainly can be dangerous.