It’s on you. They’re talking about the 90 degree elbow behind the bong that heads upwards. It’s piped like it’s to a vent, but the location relative to the cabinet opening means the vent for the sink is… between you and the sink
[edit] so their comment is saying “yea I see the bong, but that plumbing work is shit and I can’t get past it”
Anything by David Foster Wallace. Smug, preachy stream of consciousness garbage that is then annotated to oblivion by more stream of consciousness smug preachiness.