What's the funniest or dumbest thing you did?

I had been using an amp in stereo and got another one so I could run them monobridged but forgot to switch the one I'd been using to 'mono' and listened to it like that for about 3 freakin' days before I finally figured out what was not quite right with the sound.....duh!

Bought new speakers, biwired them and couldn't believe how bad they sounded. Friend of mine bought them (at the cost less shipping) removed the JUMPERS, and he is still enjoying them while i bought and sold several speakers since!

Another one! Sold my turntable on Audiogon. Went through great lenght to find and pack the sucker (Thorens 166 mkII). It was a good sale, the table was tweaked, AQ Mat, Ortofon MC ctg, new feet etc...good for several hundreds. On the way to UPS, i was to put the box in the trunk/hatchback of my Mustang. I got the phone call, my wife went out to call me. I cut the conversation short (tele-marketeer) and went back into the car. Turned the key, placed in reverse and ran over something....!!! You can guess the rest!

I had a CD Player with volume control but wanted to integrate it with other sources so needed switching and volume control. Built a passive box with remote controlled switching via top quality relays and a motorised volume pot, bypassing the volume for the CD player. I didn't put any security code on the remote and the sun managed to trick the volume to go up to full, while switched to a radio station, while I was out for some hours. My speakers were totally blown into next week - wires poking through the cones, all caps blown on the crossover - only the cabinets were recoverable. It must have been incredibly loud. And I thought I was saving myself money by not buying a top preamp - quite the reverse.

The absolute dumbest thing was setting the speakers on the window sill of a 2 story apartment so it could be heard outside. Fourth of July party, playing some patriotic music loud when crash, no not a cymbal but one of the speakers falling 16' to the sidewalk below.