familiarity...breeds confusion?!

Being at home this week, its a bit strange. You expect to know everyone that you pass walking down the street, or in cars etc... it's just quite funny when someone thinks that they recognise you! Walking merrily down a very familiar road, I saw a car that I thought I recognised, so as you do you look into the car to see who's driving... so I did, and they looked back at me, I had no idea who they were but they beeped the horn and then waved as if this woman knew me, it was quite ironical, funny and a bit weird. today I must look like someone else.