My neighbor just gave me a bottle of 1978 Dom Perignon which has been sitting in his house all that time. He said the only time they drank it was in 1985... one bottle out of a whole case. Since last summer the case has been stored in storage facility while his home was undergoing renovations, so I would think there were some major temperature changes. Will it be ok to drink? I should be able to tell by smell, right? Assuming it's ok to drink, what should we expect? I ask because although we like wine I've only ever had anything of recent vintage. Thanks!