randomly for the first im ever, my brother was on my macbook and all of a sudden the computer froze and it had a ticking noise coming from the inside. it honestly sounded like a ticking time bomb i shut the lid but it didnt go to sleep the screen stayed lit so i shut it down with the button and started it back up. anyone had this happen before? anything bad? my warranty is up in a month so im just a little worried even though i plan on getting the applcare this week.