My buddy said he decided to make a cider. He tends to rush into things so he didn't take any gravity readings. Anyhow, the guy at the store said it's "best" to use champagne yeast and to only keep it in the primary for 7 or 10 days max. After 9 days he decided to transfer it to the secondary and sssaaayyysss that it was carbonated......He said when he transferred it was bubbling like it was carbonated( maybe fizzing) In my opinion I thought that would be pretty hard to do full fermentation and carbonation in only 9 days. I told him it's probably just still fermenting. Any thoughts? Especially on what the guy said at his LHBS?