Forum:Deja vu

Hey guys. I have a quick question I hope you can help me with. This morning I was playing Adavanced Warfare online. It was a game of Hardpoint on the map Biolab. I was headed into a building and shot one of those big tanks of the manticore liquid. When I did it a symbol popped up like if I were to get a medal like bloodthirsty or a headshot medal or something. The name that popped up instead of, say bloodthirsty, was deja vu. My question is what is deja vu? It didn't show up in the game summary under medals OR killstreaks. Just curious if this is some sort of easter egg or what. Just curious. Thanks in advance.