Aaah, but it's like having drain cleaner poured on your tongue and rubbed in with sandpaper, but in a way that for whatever weird reason makes you want to try it again. And again. It's oddly tasty, and you keep thinking "it can't possibly be as bad as the last time" and then it is. But still hauntingly tasty.
Weird experience. I want to spit it out, but I also want another piece.
On a side note, the salt used (ammonium chloride) is also a primary component of soldering iron tip cleaner. You can buy blocks of the stuff for that purpose, it's highly effective (though extremely aggressive, so to be used only after the wet sponge and brass wool have failed to remove the oxide). Works about like you'd expect it to, given the taste.