Hi Jeff,

Even if the bottle contents are carbonated, I don't know that many could even replicate the trick... (anyone who can, please do post a video...)

Many people look at the trick and think it's a fake... sometimes it is and sometimes it's not. When it's not, it's indicative of some level of skill - skill which has martial applicability.

At the end of the day, it is the skill one should be focusing on developing.... and not just the parlor trick.