So. I made a batch of Fast Pitch to feed some yeast I harvested from a bottle. Today I took a sip from the starter, just cuz I'm learning. I then went to taste the Fast Pitch, again, cuz I'm learning. I had stored that in a growler I sanitized with starsan. When I opened it, it fizzed like a shook up coke. I have now made a new starter whith that, to see if I accidentally found some new yeast. Am I correct in assuming that a batch of Fast Pitch would not carbonate if something else hadn't gotten in there?