You worked in a kitchen. 9 to 5, Monday through Wednesday. You (unfortunately) picked up some habits from work. (IE: nudging people with your foot to inform them you're there, saying "behind you", etc.) You also happened to live with the turtles (Mikey, Raph, Donnie, and Leo), despite you being human. Now was one of those times where your habits startled someone. It was a typical Wednesday night. You were in the kitchen with Donnie, supervising him as it was his turn to make dinner. As Mikey walked past to grab some water, you stated to him, "Behind you" on impulse. Needless to say you totally startled him. He did NOT expect you to say that so suddenly.