I gave up saying "on your left" at the lake where I most often ride. I'm not a jerk, it just got old saying it dozens of times only to never be heard because they're listening to an ipod. I just go as far around as is safe for me and call it good. I did have a runner turn around without looking on the path about 4 feet in front of me as I was barreling towards him. Scared the diddly-doo out of both of us!
glad you're OK!