A friend of mine was flying into SFO this weekend to visit me. We carefully worked out the plan for how I would meet and pick him up, carefully factoring in the possibility that the BART strike would continue and transit would be restricted. We congratulated ourselves for establishing a totally watertight plan.

Of course, a different plane crashed on the SFO runway about an hour ago, so all incoming flights are being redirected to distant airports. Learned a valuable lesson - my predictions for worst-case scenarios are nowhere near pessimistic enough.