How can I intentionally crash my lappy?

[mechtheist]

I am no programmer, but know the rudiments [the rudi'est of rudiments] 
of working with Python.  I have a simple need,  to have a simple 
script/app I can run that will crash my PC.  On my desktops, I can 
always hit the reset, but that is not an option with my laptop.  Can 
anyone tell me of an easy way to guarantee a program will instantly 
kill/BSOD my windows7/64bit laptop?

Any help is much appreciated.