Doesn't have to be cheap vodka and Imitation red bull, the real stuff is just as bad.
I woke up one morning on holiday in spain after an evening/night of drinking vodka and redbull (buy one get one free none the less) spanish night club measures of vodka too.
I had 5 staples in my head (I had no recollection of them being put there) and the mother of all hangovers, which is very unusual as I very rarely get any hangover at all.
Apparantly, I tried to have a conversation in french with the Spanish Ambulance man which was quite amusing. Going for the check-up a few days later at the local hospital was a challenge too. They told me to go to the same place that I went to before. Which I still had no recollection of.
Luckily, I am not a violent drunk, I just missed my chair and met with the bar on my way to the floor headfirst.