Ok, so I was just on my Nexus, playing around. Then I decided to go on Facebook. I didn't realize that I didn't have wifi.So I go on, and the whole thing SHUTS DOWN. It makes weird noises. the screen goes all fuzzy, and I freak. I tried holding down the buttons, didn't work, I unplugged it from the charger, it just DIED. I'm really upset. This thing is brand new! Gah, what should I do?! Please help!