Similar happened to me. I was at The Oaks Card Club on the border of Emeryville and West Oakland. I needed to get to BART, and it was just a few blocks on one street, so I thought I'd just walk. About half way down, a taxi driver actually pulled up without me hailing him and said "Man, what the fuck are you doing walking here? Get in and I'll drive you wherever you need to go!" It was either a great sales pitch or I was actually in danger and didn't know it.