Chewing with mouth open. Gesticulating with your fork during a meal — jabbing it in direction of fellow diner. Talking loudly. Constantly interrupting. Taking a phone call when it can wait and when in a conversation.

NYC in the USA, I agree with Annie. I read that some customers came in near closing time and the chef, named Caesar, had very few ingredients. So he made this unique dressing and put it on lettuce with shredded parmesan and tossed on some croutons. It was a huge hit and people began asking for it. It was the dressing.

Dolphins. Oh, wait....

Of boredom from chewing their food for 30 seconds. Seriously, I don't know what kind of big bites the people in that study were taking, but 30 seconds is a looooong time to chew.