One of the more crazy experiences anyone in the U.S. Marine Corps will have and remember for a lifetime is the first time they go into the gas chamber.
As a new recruit, they have no idea what to expect. One thing is for certain, though: when they leave the gas chamber after the initial coughing and spitting, they’ll suddenly be able to breathe better than they ever have in their life
These Marines are going through their training with the use of the mask and seals, so it looks like this isn’t their first time in the chamber.
It’s no easier going through the second time, but at least they know exactly what to expect.
The gas chamber is excellent training to go through because anything can be encountered during combat.