Funny you should mention that... Just last night I and my colleague took a whole bunch of old computers that we were refurbishing outside with a leaf-blower.
Well, mine is not among those, but during many years of computer service i've seen worse ones, but the mummified frog and that one with the spider feeding ground are pretty good
Had one in our installed base come back ( user complained it didn't work ) to find that a mouse had created a little home in there and had babies. Nothing worse then mouse urine on your MB.
"DISK BOOT FAILURE - INSERT SYSTEM DISK AND PRESS ENTER" is my friend