Screen turns black when gaming?

Hi guys, I bought a MacBook Pro 15" three days after they were released.. everything was going just fine until yesterday, when I was playing Call Of Duty 4, and suddenly my screen went black. I closed/opened the lid and still it was black, everything else was running just fine cause I could hear the game running through my speakers.. but the screen wouldnt turn back on no matter what. I had to use the power button to shut it down and get the screen back.

this happened like 4 times yesterday (all of them while gaming)

should I take it back to the store?

Any help would be greatly appreciated, Thanks.