3 times
1. About 1998, driving to work a lady tried to cut across traffic to enter the highway ramp. She got T-boned and flipped her Blazer up on the driver side.
2. Driving home from work and a kid in a Ford Probe who thought it was a Ferrari was driving like an idiot! I kept up just to see him lose it. He did when he tried to take an exit from the passing lane and spun it out into a grassy spot and into a huge bush.
3. Where I rehearse for my band is a room they rent out for parties. There's a bar upstairs and one night the bartender (about 60-65) couldn't get in touch with his girlfriend for a few hours. He was closing up and asked me to drive him up to his house, about 4 blocks. He said she was sick with the flu and was afraid to go in to his apartment. I went in and found her hunched over in the recliner (head at her knees) so I checked for a pulse. She was cold and no pulse. I had to go outside and tell him she was gone. Called 911 and told them. Sad seeing him on his knees in front of her crying. Top it off the cop was a dick to him when he was asking him questions about her health.