I never pass a truck on the outside of a 'real' bend. I've never seen a truck flip like that, but I have never, and will never do it. They will swap lanes suddenly and leave you no room to pass. You can't see past them to alert you to obstacles that will force their hand. Once I decide to pass, I get it over and done with as quickly as is safe. There is nothing to be gained from being next to another vehicle when on a bike.