They wouldn't. He's wearing a double mask. The video res is low so you don't see the straps properly.

Yes, ur tripping. Put headphones on and listen to the reverb in the room. There is one edit 1:28 but meh, whatever.

Smoke released from aircraft was originally based on a mixture of 10-15% dye, 60-65% trichloroethylene or tetrachloroethylene, and 25% diesel oil, injected into the exhaust gases of the aircraft engines. Most commonly, teams now use specifically prepared liquid dyes and only gas oil, light mineral oil or a food grade white oil without harmful chlorinated solvents.

https://novaspecialties.com/novasmoke/