quick shutdown

I'm trying to get a script going that would shutdown my linux system in case of emergency (like the CPU fan going bust). Is there a way to shut down cleanly, but without taking the trouble to stop all running services ect. I want it to just unmount all mounted systems (hard unmount, weather or not they're in use) and have ACPI or APM or whatever switch the machine off. Is this possible? Any pointers appreciated Thanks Hans == Download ringtones, logos and picture messages at Ananzi Mobile Fun. http://www.ananzi.co.za/cgi-bin/goto.pl?mobile