Little blue spritzy thing in mid lane in summoners rift

So i just played a game and there was this blue stuff its kinda of hard to describe but it was spritzy and kind of showering down it wasnt very big. It eventually went away. I asked my team mates if they saw it but they said they couldnt see it. I took a picture with my phone but idk how to put that on here so has anyone else seen it?

Alright its that blue thing next to teemo it was there for like 10 minutes and it was there regarless if anyone was there. Like even if minions werent there. http://imgur.com/DQHOmFE