Oh my goodness! He is very lucky he didn't get very ill. As someone who got absolutely blind drunk the first time i encountered alcohol we don't know that we have to take it slowly so we drink it all very quickly and so when the affect takes over we get very sick. I was sick for a week afterwards. I would be having some stern words with the boys mother and asking how in the world your son firstly got to a bottle of vodka secondly why he was able to drink it all to himself and why she didn't think to call and ask whether it was ok for him to have a drink. She doesn't sound very responsible at all.

this may also be me being very protective and feeling sensitive to this issue but my brother is going to have a mental illness for the rest of his life because of alcohol abuse and drug abuse. A teenagers brain isn't ready for the copious amout of alcohol some teenagers have. I really hope that this is a good enough lesson for your son and he doesn't do it again. And i hope it makes him drink in moderation in future.

BIG BIG to you.