These chemicals are industrial strength and way more toxic than anything you would come across in your home. They've been engineered to be virtually odorless and easier to breathe.
Or wet, rotting, fallen leaves (This one is dumped most often).
Exactly like fresh tomatoes cut-up and cooking, but stronger.
Phosgene? Cut grass but "sweeter." Only sprayed for two weeks.
Soman? Menthol cool burning in throat and lungs.
Makes you want to sleep. Once spraying stops, the effect goes away. No grogginess.
Feels like large dust particles get caught in throat.
Salty taste in mouth gets so intense I have to spit it out. (Used often.)