Sometimes, you need a plan.
When I visited London for this, I had an image of back to the future, replacing the De Lorean with a double decker bus, in mind.
I was tempted to use rear curtain Flash, so the bus was visible at it got close, but decided it would be a little unfair to blind the driver as tourists were dodging around.
Still, I was pleased with how this turned out and have seen many people emulate it since. I can’t say it was my original idea, I am sure it was a mish mash of lots of other things I had seen.
It is available as a print, canvas or in other formats here.