A high amount of salt can kill you or make you very sick. And for the smartasses that inevitably comment that killing you is the point or not a bad idea, it's not the point if someone is just trying to test something, and if dying were the point, there's actual SN.
I've tried drinking salt with water to test, it tasted very salty, and I had a lot of symptoms. I was trying to see what it would feel like. After about an hour I drank a lot of water to flush, and I had to rest for a couple hours.
If you do this, I'd recommend just swishing it in your mouth. I don't recommend ingesting it.