Smelling salts are mentioned as a way to trigger the fear and arousal systems of the brain, waking up the brain and body in a major way. They contain ammonia, which is a toxic scent that triggers the innate pathway from the nose to the amygdala.
"The podcast mentions smelling salts as a way to wake up the brain via the olfactory system. It is described as a product that triggers the fear and arousal system through the scent of ammonia, providing a significant alerting effect."