There have been times when a belch catches you out of nowhere but at least have the decency to say "excuse me" afterwards. Just yesterday I was on my lunch at work and there were several people in the breakroom eating, and one of my co-workers belched a very smelly burp at the table and didn't even acknowledge it and even blew the air out towards everyone else. Now I was eating and that shit just grossed the fuck out of me. Everyone else at the table kind of gave eachother "wtf" looks and we all lost our appetite.