Believe me, when Mike tears off his shirt and his muscles blow up like balloons and his face turns a nice shade of Irish green, things happen. They are still trying to remove the remains of a service writer off the wall of a dealership that told him, "Sorry Sir, we can't replicate your third gear transmission problems".
In all seriousness, as Mike said, go in polite and cordial. Explain what happened and state the seriousness of the issue. Ask the dealer to take a look at it and ask them what they intend to do about it. If they refuse to do anything or wave the modified parts deal at you, let you Hulk side come out and start dismantling that dealership.
