How could that happen, IF IT REALLY Did happen you just hit the damn jackpot, assuming you have status with AC that is.
I guess you can call in and pay the $25
UPDATE: Assuming your departure city actually has MLL that is, I don't think SFO has one.
You can always request to be guested in the thread, Cow and few other SEs are based in SFO and most of them are quite nice