Web giant Yahoo has installed 20 large touchscreen displays in bus shelters across San Francisco. These displays are not for trailers. Instead, they're to let people engage in some free multiplayer gaming.
It's called the Yahoo Bus Stop Derby, with commuters able to choose from four simple games to play. While they play, their results are being tracked and updated in real time, letting residents of various neighbourhoods see how they shape up against their cross-city rivals.
There's the option of solo play or multiplayer, provided there's somebody else waiting at another bus stop who wants to play the same game as you.
The screens come down on January 28, so if you live in San Francisco and either drive or walk to work/school, you don't have much time left to take the bus for one day and kick some stranger's arse.