Just got my hands on a video of Monday's derailment, check this out;
Couldn't quite tell for sure because of the vid quality but it doesn't appear that any of the coaches derailed prior to when the rear truck of the last coach impacted the switch. But the loco could very well have already been on the ground before it appears in the video and if so just goes to show how far a train can go even when derailed at slow speed. Crazy to see the entire coach launched up several feet in the air like that as well. MX's strongly emphasized that the train derailed at a "slow" speed, but that impact was still somewhat violent.