Stroll had come on from the right fo the track a few seconds earlier and a car was coming on from the left. I think Grosjean was anticipating the pack in front of him having to slow, so he went to the right where he thought he was clear. Obviously he wasn't. I think the accident was entirely Grosjean's fault. He was saved by good design, by the FIA's push for safety, and by some very good luck. If the survival cell had stayed inside the barrier it could have been impossible for him to escape. If the fuel tank itself had ruptured then the fire would have even greater. One thing's for certain, this accident illustrates exactly why the Medical Car trails them for the first lap. Can that be improved? Should we send a second car with nomex-clad rescue crew with their own firefighting equipment? The sport (and other sports) should always look hard at accidents like this to see where the preparation or response can be improved.