Screen Problem

I played and tested some of the new stuff in the snapshot, and I found something weird. I've got a bow with Flame and power 5, and I used spectral arrows. When i shot an animal or mob, and it dies with the spectral effect on, my screen flashes for 1 second, turning the water into black, like it's refreshing or so. It might be my laptop's problem, but i found it quite weird.