This one could only happen in the UK. In my teens I used to go out on training runs which ended up returning via a lane past a local psychiatric hospital. On one of the runs I was brought down by a dog who ran in front of me and as far as I know was found by a member of the hospital staff who treated me. Because of apparent concussion, rather than move me to the main hospital I was moved to one of the psychiatric wards for observation, which is where I woke up!
I've always felt that this was an indication of how people felt about cyclists in England back in the 1960s.