Caption competition

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Here's a dramatic shot from the beach volleyball delivery (see Beach volleyball in the City). It's an early Sunday morning, and there's no traffic in Canary Wharf. Then suddenly, the quiet is disturbed by the slightly menacing growl of two six-cylinder diesel engines...

Can you come up with a good caption? "Streetwise tippers" was my initial stab but I'm sure you can do better. Please drop me a line at the competition@bourneconnection.net address with any flashes of insight!