It's happened 3 times now.. It's a brand new 2013 macbook air, had it for maybe three weeks now. and the screen will flick off and i'll have to reenter my password to get back on. Am i just accidently hitting something on the keyboard or is there an issue? I'm at school now, and the apple store i bought it from is around 4 hours away so i can't take it in. I have apple care though. thanks.