It was a joke!
A few years ago, when I knew C++, I made a program that would slowly eat the memory up until, when you did something, there was no memory left to do it with and the Windoze box crashed. This was, I think, ~Win98 days...
It was fun, plus the faster the computer the faster it crashed. At one point I made it count upwards, so it seemed like a fun little program. Then, BOOM! Of course, the computer I believe had 64MB of RAM, or maybe 128...like I said, this was a number of years ago. Fun nonetheless.
I think that if you are in the US, you can change the Power Supply to 220 Volts so that it won't start due to too low voltage. But in England, you swap that to 110 volts, it will blow. You might want to double check this, BTW, so that you don't injure your friend in the process...