Every Gigabyte counts as 5oz of extra weight for your computer.There has been cases (in computers with 1Tb of Hard drive and more) of people left eMule activated 3 days and when that people returned to the computer,there was a hole in the floor instead.

But, here's when a strange thing happened. As i was about to get up (I usually read in bed) my head was so heavy that I couldn't get up. I roughly estimate the wheight increase ~564.32 grams.
Well, I attributed this phenomena to the amount of information that got stored in my brain during that time (Notice the similarity there ? )
I eventually fell asleep and when I woke up a few hours later to take the MS exam guess what?!? My head was light again, and I consequently failed the Exam as I couldn't remember anything a read on that book.