I'm an over-hyped spreadsheet wrangler now (AKA "VBA Developer" or "EUC Specialist", god help me) , but in the early stages of my IT career I had the job of babysitting a room full of 486s running stats for a finance company. They were housed in a "server room" - AKA a converted cloakroom under a post-war office with aircon, some real servers and a UPS for said servers - that one day had a fire.
I got a call on the sunday - can you come in early on monday, check the machines are okay, see what can be up and running before the finance peoples come in.
I agreed, and made my way in at dawn o'clock, wandered down to the basement, badged into the server room, walked past the burned-out hulk of the UPS, and set to work. Most of the old pentiums fired up fine: three out of the 50 didn't. Two were just dead, the other would randomly crash periodically: not bad for a hard-power-off followed by a battery acid fire.
Later in the day I was chatting to the head of our local IBM team, who said "I wanted to go rubberneck, but security say no-one should be down there unaccompanied". Guess who's manager neglected to mention that when calling me in?
So anyway, I had a nasty cough for weeks afterwards. Might not have been related, but... yeah, I probably should have thought of that myself, really.