I'm sorry but dissect it with a bomb or with a scalpel, the guy said: "It is impossible." and "It shouldn't work."
I'll agree that the scientist changed his stance and it's for the better, but you have to be closed-minded when a complete explanation is given to dismiss it on the basis that you've never heard of that, think it's impossible or, in your knowledge, that "behavior" shouldn't work/happen.
Skepticism is -wanted- and -needed-. You can't just take anyone's word for granted, but making claims like "this or that is impossible" is pedantic when you have a knowledgeable enough fellow with all the science of his claim. You may be, and should be, doubtful, but dismissive? Never.
There's ALWAYS someone more intelligent, more strong, more inventive, more... Nothing has been fully done and everything is not known and invented. There's always a better way, as hard as some people might believe otherwise.
Again, that scientist was "intelligent" enough, or curious enough, or just plain wanting to humiliate Mr Cola, we'll never know, but he went there and saw.