Cultural knowledge is one of the most important ways a person can show a foreigner that his nationality is respected and understood. Hence why, a bit of research about diverse practices and traditions should be your concern, especially if you are visiting a new country or if you are surrounded by foreigners.

However, Cale, the artist behind the Things in Squares project has put together a few images showing how you can get people mad by doing things differently. From breaking spaghetti into two pieces, before boiling them, in front of your Italian buddy, to wearing shoes inside the house when visiting your Japanese friends, Cale came up with inventive ways to piss people off.

But that’s not all, because nobody expected him to add Martians to the slideshow! Do you want to know how you can make Martians go completely crazy? Just check out the hilarious comics below!

And by the way, do you know want to know what other things drive some people crazy? Then read about the funniest pronouns some people picked for themselves.

More at: designyoutrust, Things In Squares