The mystery artist dressed in shorts and a white t-shirt moves quickly to write the message with a backwards E on hoardings in Shepherds Bush.
In the video taken from council CCTV, the man checks for local enforcement before cracking on with his major contribution to society.
Schoolkids are seen to stop and laugh as they see what he is spraying on the grey panels.
Took me a while to realize it was yoga and not Yoda
I was imagining some sort of enema tube going between their butts.