Mac Forums

I have a few questions about my "relatively" new Macbook Pro. I was prompted to update my system tonight. I did so, seeing as I was about to go to bed. As usual the updates installed and the computer turned off and I expected it to restart. However the computer did not restart. Finally, I pressed the power button in an attempt to get it to turn back on. It came on for a few seconds (nothing but a black screen) and then died. I repeated this at least three times before getting some result. After pressing the power button for the fifth time, my computer was finally able to successfully reboot. Any advice? What happened? Should I be concerned?