I have an HP Elitebook and I am running Windows 8. I was watching a video on YouTube using chrome. I got up but was standing on my Ethernet cable so when I pulled up the computer there was a tug that pulled the plug down a bit. My screen immediately went to colorful static, in horizontal lines. Not vertical, not pixel white static, horizontal lines in the colors of the video I was watching. It fizzed with white noise audio and I got scared so I shut my computer. When I opened it back up it booted and all of my applications were closed as if I had just powered down unsafely. Everything was safe through recovery documents (thank you auto recover features) and then I went straight to this site. Should I be worried? Is this okay because the problem isn't persisting? I'm worried that this might happen again so I'm backing up all my files.