[spdif899]

Noting the vehicles driven in the tunnel are the Model Y and X, which are both equipped with a massive HEPA filter and an HVAC mode that pressurizes the passenger compartment while routing all incoming air through the filter.

This is designed to allow owners to drive through a wildfire, for example, and in testing has performed quite well.

I would love to see a video of testing the scenario discussed here. Enclosed tunnel with poor ventilation and fire safety equipment, the car in front of you catches fire, can you just sit there perfectly fine?