Yesterday evening we had one of San Francisco's primary rules illustrated to us in vivid detail. You all know it: if you want to get somewhere on time, don't take MUNI. We were headed to Noe Valley to meet a friend and cadge a ride to Oakland, and we'd told her that we would be there at 5:25.

"5:25?" she said. " You're pushing your MUNI karma by saying such a specific time."

After the jump: what happens when you push your MUNI karma, and video goodness!