On my commute I often see a guy with two handlebars on his bike. One is a swept back, old fashioned shopper type, high up for a sit up position. The other is a set of drop bars underneath.
The guy sits at lights using the top shopper bars and sets off. At some point he'll move to the drops, then back again in traffic. Not sure why he has this setup, but once up to speed he's fast. He's slow off the blocks at lights but soon passes me and just cruises away. I've never had the chance to question him about his set up.
Anyone know why you would want such an unusual setup?