Hoovered up the boot of TBE, as shreds of rubber had gone everywhere when the tyre was chucked in the boot fast, as the hard shoulder of one of the country's fastest motorways is never a great place to be.
so what's the back story then ?
I hope no one was hurt
debris in the road
or where you going that fast that the wheel melted when you braked 
Spill the BEANZ 
Dunno full story, she was a bit shaken up, and she took my shouting at her as a sign of grumpiness rather than a way to get clear instructions to her about watching the traffic whilst I was changing the wheel on the hard shoulder.
She did say she hit some debris before we went on holiday, but all 4 tyres looked OK to me when I checked, other than the rear ones being towards the wear limit. Pressures were good earlier in the week, but to me that tyre has overheated, and I can see no punctures (but can't check inside of tyre as all the steel bands are razor sharp and hanging out. Although she's usually good to notice if a tyre is down by its handling.
Yesterday was the first day she'd used the car for work, and from what I can glean from her, it let go dramatically as she was coming home in a hurry, outside lane of the motorway.