I saved a coworker from walking into a propeller at least once when I worked on the ramp. I noticed he kept getting a little too close without really seeming to notice what he was doing, so I kept an eye on him. Had to grab him eventually. Pissed me off. We worked with Dash-8 aircraft, big ol’ propellers. I raised some questions about it with our boss, so he asked this guy some more questions about why THE HELL he would even be that way, ended up talking to this guy’s mother?? for some reason, who informed him that this guy had a learning disability that we weren’t aware of. It explained some other things about this guy, but it just gives me shivers each time I think about it.