I passed two ladies out for an early morning jog the other week. They were in my lane, oblivious to my lights, bright front light and brighter strobe, oblivious to my repeated, "passing on your left" even in a loud command voice.
When I went by, both jumped, screamed, and one yelled, "Oh God! I just pee'd my pants"... I just about fell over from laughing my butt off.
Semper Fi