Unexpected? Maybe a low probability event, sure, but you can't tell me that they're just completely taken off guard here? You've had partisans in country for months now, blowing stuff up behind enemy lines. There is a movement of people who are super anti Putin and they are waiting for their moment to strike.

Every organization in Russia that wants Putin to go away has to look at what happened over the weekend and are making plans to do that, but not stop at Moscow. Get people ready to receive Putin in Saint Petersburg when he lands.