It bellowed out a Heavenly warning in 390 B.C.
A certain soldier named Caedicius heard the voice issuing from a bush — although not a burning one.
It was right on time to warn Rome that the Gauls were coming and the city unfortified. Caedicius ran off to tell the authorities but unfortunately no-one took any notice of his military intelligence — until it was too late. The Gauls sacked the city — and probably burnt the bush as well.
Much later, a shrine was built to mark the spot. The voice was deified, but it never bothered with humans again and who can blame it? This is proof that the Romans gave a God to anything, even if they couldn’t see it.