Best thing said to you on a bike

ihatelaw I love all the pictures of people commuting on FS bikes with full face helmets. They've got me thinking, what's the best addition/customisation/innovation you've seen on a fluoro commuter's bike?

There is some guy I have seen riding through Lewisham at about 07:40 a few times on a mbt with what seem like small 12" plastic dustbin lids mounted over each grip on the handlebars loads of mirrors some random plastic containers strapped to his rack. Bike must weigh a ton.