I first attempted this task about a week ago, but all my footage (including an oddly uniformed police officer giving what appeared to be a citation to some kids to move on near the Powell Street cable car turn-around where they were trying to get money "for BART" according to their cardboard sign) were full body shots. Unfortunately, like a spazz, I deleted all of those videos anyway.

I tried again yesterday. This was taken at the Heart of the City Farmers' Market near the fountain at the U.N. Plaza. Voila!