I was walking back from Tetre Rouge right after it happened when the marshals etc had just gone over to the car. when we saw the fire brigade, ambulance & the screens the marshals held up etc it didn't look hopeful at all.
So glad to hear he was ok on the radio an hour or so later.
After the race we walked over & had a look at the scene. looks as if the car hit the end of the tyre wall flipped landed on top of the armco bounced off landed further down on top of the armco spilling oil everywhere then carried on a bit further along the barrier & stopped.