The last failure I had was on a rental van.
I was on the M2 at motorway speed when there was a loud BANG. Gunshot loud. Didn't feel anything, but I pulled over gently to investigate.
The tread was no longer attached to either sidewall.
How much more sudden would a tube make it?
It appears the previous renter had reversed it over a patch of nails - there were several in the other back tyre.
Andy