I remember running a small Windows app that would sit in the background and pipe sound of various frequencies through your speakers depending on system state. I think I had mine set up to rumble at 30 or 40Hz at 50% CPU and slowly increase the volume as it got past that point.
One night after I turned the volume up for a particularly quiet movie I fell asleep and let folding@home go. I woke up a couple minutes later with my subwoofer rattling the entire room and my roommates knocking on my door to make sure the place wasn't falling apart.
Similar experience here. My old roommate's name is Khanh and he found a clip of William Shatner yelling "Khan" from a Star Trek movie that he put on his voice mail and as start up sound for his PC. Every so often he would leave his speakers turned up and in the middle of the night his computer would restart due to a windows update. I'd just hear William Shatner yell KKKKHHHHHAAAANNNN randomly in the middle of the night.
One night after I turned the volume up for a particularly quiet movie I fell asleep and let folding@home go. I woke up a couple minutes later with my subwoofer rattling the entire room and my roommates knocking on my door to make sure the place wasn't falling apart.