The man had been pouring in wine into his system without a break and he had yet to go the bathroom to relieve himself. Zach could only wonder about the size of that man's stomach.
Even Andy and Bruce had to excuse themselves at least once during the session, but the man looked extremely comfortable as if this much wasn't enough to faze him.
Zach wasn't a heavy drinker to begin with. The large amount of wine only brought him more trouble. His system was unable to take it and he ended up drunk; dead drunk to the point that he didn't remember anything the moment he woke up with a nasty headache and grogginess that could confuse the most sober person.