Whilst driving around and mowing a few people down (playing as Trevor) in the Sandy Shores area, near a big grain/corn silo factory (several big tanks etc. I think), the words 'You're a creepy psycho' appeared on the screen as the usual subtitles/CC text (which in itself is weird as I don't have subtitles turns on).
I was being chased by the cops and got shot before I could investigate further but does anyone know what this was? Is it part of a random event that I missed? I haven't been able to come across this again since. A bit of Googling shows a few forum posts relating to this but no answers/follow ups.