I haven't smoked for over 2 years now. I used to go through 50g of rolling tobacco a week. One night I just thought 'sod this' and threw my baccy away. A few days later I had what can only be described as a massive panic attack, my heart rate was going like mad and I could hardly stand, it was so bad we ended up getting an ambulance. The paramedics said it was cold turkey from quitting smoking and did a good job of calming me down. Pretty hair raising though, I thought I was dying. Been fine since and not touched a cig.