A bit of a different Spotted, one with an explanation...
During the Olympics, many countries have taken over spaces in London to celebrate their cultures and athletes, welcome guests, and basically have a great party. The biggest ones are Holland Heineken House at Alexandra Palace and Switzerland House on Southbank, and we are lucky enough to live down the street from the Czech House in Islington.
The Czech Republic commissioned a fabulous sculpture outside of the venue by artist David Cerny, whose weird baby sculptures are found all over Prague. This time, he's animated a London bus – it does pushups while grunting. There is a video below, so you can see it in action!
If you're interested in hitting up some of the nation houses during the rest of the Games, here's a good guide to the ones you shouldn't miss.