I don't mean to sound rude but it sounds to me like you have completely overreacted. People say much worse things then just being called "quiet". And if people laughed, then just laugh as well, friends do laugh at each other as well you know, over here it's called "banter". You don't need to make a big deal out of it and say you will never talk to that person again.. And the dog laughing as you fell over is quite funny.