Hit by 2 cars
The second car that hit him was the fatal one. Apparently, and I believe this, the driver was distracted by all sorts of people trying to stop him so he wouldn't hit the old guy... So, instead of looking forward as if he were driving normally he was looking to his sides where everybody was jumping up and down.
On the topic of unintended consequences...
During the shootout situation at that mosque in New Zealand or Australia, as soon as the gunman went to a different room to start shooting other people, everybody started moaning and groaning which only prompted him to return and shoot them more. I saw an interview where a young guy at that mall in Thailand is recounting he told everybody in the store to be quiet so as not to attract the gunman. Smart dude, he's got a future.