When people bumped to a nation's chair:

America: NIGGA WHY THE F*CK DID YOU JUST DO TO MAH CHAIR

Australia: Tch.

France: I WILL HAVE A REVOLUTION!!

Germany: I will invade your country.

China: CHENG CHONG CHING CHANG CHONG NIIII?! ARU?!

Sweden: B*TCH IT'S FROM IKEA AND JUST BUMPED TO MY CHAIR LIEK THAT, HUH?! 

Russia: ......

Japan: *blush* Omg..Senpai bumped my chair...*blush*