I also got incredibly drunk and sent an email to the full office staff quitting and telling them exactly what I thought of them and it was personalised so for instance.
Shiree - you are the biggest bully I've ever met and you need to lose some weight.
Christine - you are a cunt, please also brush your teeth.
Gemma - you were okay but two faced.
That kind of shit along with saying ' I would rather die than work another day in your establishment '
I woke up the next day thinking OMG no and my stomach just dropping. Checked my emails and they had acknowledged my resignation 
5 years on and the best thing I ever did, have never been happier.