Re: Maybe a fix for flat soda flavors...
You realize that the fizz you feel on your tongue is a tactile thing due to the actual bubbles being released from the liquid in your mouth. Smoking through carbonated water will have NO effect on how the flavor will feel "fizz" wise. If you do feel anything, consider it a placebo effect since its impossible for you to get this sensation unless the carbonated water makes direct contact with your mouth.
You could try maybe pop rocks and then smoking haha I dont know how that would turn out.