why does coke get fizzy when you add mint to it

Question: why does coke get fizzy when you add mint to it
- Keywords:
  coke,
  fizzy,
  mint
Asked by ruella to Ed on 21 Jun 2011.
- Ed Morrison answered on 21 Jun 2011:
  
  Isn’t coke already fizzy? I’ve seen the videos of this, and it’s quite spectacular. I don’t know what exactly goes on but I guess something causes loads of bubbles to form which then get forced out at high pressure.

Question: why does coke get fizzy when you add mint to it