By Liverpool Street Station, I Stood Up And Sang

You might not be permitted to dance at the Jefferson Memorial in Washington, but London's Liverpool Street Station is definitely flashmob-friendly. The world's first-ever RickMob gathered there on Saturday... Groovy, baby:

According to the BBC: A British Transport Police spokeswoman said: "We monitored the incident. There were no problems, no arrests. They did what they had to do and then left."

[Hat-tip: Banditry]