A hangover cure favoured by some friends in the UK (I usually favour Alka Seltzer!) - I suspect a little 'hair of the dog' theory, a little 'it'll make you throw up so you feel better' theory, and a little 'medicine is supposed to taste bad' theory. I don't mind it, but then I also like Campari! Frankly, as long as it doesn't have a raw egg in, I can cope!
Taking into account I look neither young, nor trendy, I was in a bar earlier this year, where I used to go frequently. It is slowly morphing into a tequila bar, and I told the bartender that a friend would be interested, as he likes tequila, but his preference is actually strong small cask bourbon ~60%) He then pulled a bottle of ~60% tequila out and asked if I wanted a shot, but that it was expensive, (I forget how much tho) I declined, not because of cost (which I assume was his thought) but because I really don't like tequila (tequila is my can't smell without feeling rough drink due to past imbibing!) so he said 'if you can shoot it without making a face, it is on the house'. Now one thing about me, I am reluctant to step away from a bet (well, one that isn't going to involve police or hospital) so I did it, and with amazing self control, didn't flinch! It was REALLY strong, and made me want to hurl! It was worse than Fernet by a million miles, so whilst I don't think I have ever shot Fernet (normally mixed with tonic or soda, rather grossly with flat leftover open cans of mixers still on the table / side from the night before!) I think I could!