In Italy it's (unfortunately) customary for people to go ringing the bell of the houses to recommend a contract with a gas/electricity/whatever company. They just came here and wanted to suggest me this contract which I didn't want. I should mention that these people are always very subtle and present themselves as "just checking" if everything is "alright" or things like that. I told the guy I wasn't interested. He became immediately so very rude and told me "sorry, I have work to do", and proceeded to ring my neighbor's bell. This got me so angry I was practically shaking. I'm overwhelmed by these intense emotions triggered by silly things.