Screen flashing on victory?

So I just played a Draft Mode solo today and then I got the enemy team to surrender. All of the sudden, the screen start flashing red until eventually the victory screen is displayed. Is this REALLY meant to be a new feature? Or a bug? Because I thought I might get seizures out there. It's not just me, others feel that too, winner or loser.

Well, Riot? Can you explain what's going on here?