Grandma HAD to be doing in excess of 70 mph to do that kind of damage. Must have hit either a light pole or tree. A telephone pole should have snapped when a 2 ton car hit it. It also looks like it caught on fire judging from the lack of paint at the windshield/roof line and inner trunk lid.
This is truly sad, and another example of why we should be road tested every few years once we reach our late 60's. How many times have you heard/read about an elderly man/woman mistaking the accelerator pedal for the brake? Children have been run over - in their own driveways, drive-through windows made - in places that aren't supposed to have drive-through windows (banks, convenient stores, etc), .......
It's a shame.