Did you ever wonder what happens when you put a cinnamon Mento into a bottle of Diet Dr Pepper? We did a bit of an experiment here at the House of Quirk, and we videotaped the results...
This requires quicktime:
Kids, don't try this at home. Go over to a friend's house and do it there.
If you really want to know the scientific explination of why this happens, they do a good job at General Chemistry Online