What Little Thing Puts You in a Bad Mood?

Reddit recently asked "what small occurrence puts you in a horrible mood for the rest of the day?" Popular answers ranged from getting to work and realizing you have a stain on your shirt, having poor or no WiFi signal in the workplace, stubbing your toe or stepping on something wet without shoes and your socks get soaked. Hate that! So, what little thing turns your mood sideways!

Is there a little thing that happens that can totally put you in a  bad mood? Answer in the comments section below or on our Facebook page.