Slick
Guru
I once had a guy wheel a toddler in a pushchair straight off the pavement in front of me. I screeched to a halt without hitting either, but he didn't bat an eyelid, either to apologise or accuse.
I think it's pretty good at getting you noticed, whether it gets a reaction after that is a different kettle of fish.
RAF Pilot on seeing and being seen.
Daniel Kahneman writes about a case in which a cop was chasing a suspect, and in the process passed two other cops beating a guy on the floor without stopping them. They were in a position where he couldn't have failed to see them, so he was convicted for failing to prevent the assault, but his conviction was overturned because of the psychology experiments that show when your attention is focused on one thing it's blind to anything else.
First class.