I used to be a valet parking attendant. And one time I was working in the key house and I got a set with pepper spray or mace. Long story short I was fiddling with it and it accidentally went off. Just like the tiniest amount in the modular unit we used as the key house. It was awful... I's use the word unbearable but I didn't want to let anyone on that I'd done the thing so I sat there being maced just doing my job while the spray evenly dissipated through the key house and everyone started coughing and vomiting everywhere.

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TLDR; dont fuck with pepper spray.