If the Universe was born at the Big Bang, what existed before then?

Pretty sure one of my science teachers said that there was some kind of gas called a ultrahot that existed before the big bang

it's a extremely hot gas

:)

t's possible that before the Big Bang, the universe was an infinite stretch of an ultrahot, dense material, persisting in a steady state until, for some reason, the Big Bang occured. This extra-dense universe may have been governed by quantum mechanics, the physics of the extremely small scale, Carroll said.

Explanation:

hawaii was the final state