I find it useful for destroying cities.

this is the most Dangerous Element in powder toy.

SING is singularity. Specifically a Gravitation Singularity, like the inside of a black hole(we can't see that because there is an [b]event horizon[b] created by light being absorbed). I'm not going to explain it beyond that(because I haven't been interested in learning anything about physics in years), but you can get more information here.

NOTE: This is not to be mistaken with a Technological Singularity, better known as the "Nerd Apocalypse", in which technology and artificial intelligence become so advanced(through Machine Learning, which is already used in some advanced spam filters as an example) that they become more intelligent than humans and in most scenarios overthrow us. The idea is that when they become more intelligent than us we cannot predict their decisions and they will advance technology past our own and overtake us.

Cr15py:

"Nerd Apocalypse"

:D