Grandpa's Homemade Rootbeer

Neither Shawn or Lizard could remember him making this, do you? I remember doing it in his backyard...

1 bottle root beer flavoring
3 lbs sugar
4 gallons water
3-5 lbs dry ice

Mix a gallon of warm water with the sugar till it dissolves. Add the root beer, then more water and dry ice. You can make a lot less of course, the recipe is usually on the box. If you make it in a big 5 gallon jug though, don't put the lid on tight...
This is now a Halloween tradition for us. Sawyer love putting his hand in the smoke.