Possible Duplicate:
Is it possible to permanently damage the hardware by software?
Browsing the mono sources I stumbled uppon this comment:
/* don't run the resulting program, it will destroy your computer,
* just objdump -d it to inspect we generated the correct assembler.
*/
https://github.com/mono/mono/blob/master/mono/arch/x86/test.c
What harm can it do?