Someone I met in university was playing Capture The Flag on campus one night. He saw some girl on the other team, so he started running at her. She ran away, and he kept chasing her. Eventually, he cornered her, at which point she started screaming her lungs out. Apparently she wasn't part of the game."
"Ages ago, before I started university, I was wandering around in the twisty backstreets near my school dorm at about 10pm (just wandering, not really going anywhere). This young lady was walking in front of me for a while, when she suddenly broke into a run and disappeared down the street. I was all "Wtf?!?" until I realised that she must have been nervous about some foreigner following her for a couple of hundred meters...