It was shocking / surprising when she died. She'd been all over the news in the weeks before, so it was normal to be hearing about her and then she was suddenly dead, whereas the week before the newspapers were gossiping that her tummy wasn't toned enough. It just seemed a bit unreal.
There's always a few who get upset about things, but that week was different. I lived in london. When I drove past Kensington Palace, the flowers were everywhere. The florists were running out of flowers at first. The newspapers were full of it, page after page, day after day. On the train to work, I noticed that every single building had a flag at half-mast (i hadn't even realised they had flagpoles before that). On the tube, around Green park etc, there were people in the carriages with bouquets of flowers. Everyone seemed sad. it was the main topic of conversation everywhere - had the press killed her? Had prince Charles mistreated her? What did Dodi mean to her? Was the driver really drunk? Where did that leave her charities? What would become of her children? etc etc
I was perfectly sane when she died, but after 4 days of unremitting grief everywhere around me, I realised that I had tears in my eyes too. The grief was just infectious.
Then she was buried, and after a while, it was as though everyone woke up after having been hypnotised. Apparently it was like that when Prince albert died too - that's when people started painting railings outside their house black. I've never experienced anything like it, but I think you had to live through it as an adult to understand what a bizarre time it was because it doesn't really bear description.