Me and my boyfriend once left his apartment and outside(it was dark) my bf was like.. Whats that?!I looked ..well I tried there was a kind of light blue-green transparent bouncing everywhere sometimes just some centimeters from our faces.. It was kinda scary the first time.The next night same thing.. but we waved at it this time and left.. tonight when I left the apartment of my friend with my bf I saw it again! bouncing in the air and on the ground.Does someone know what it is?