When I first bought my house I had NO handy-man ability and NO money. Everything I learned about remodeling and fixing things was from my Father-in-law. One time my washer was not working so I'm on the phone with my father in law and he's walking me through some basic troubleshooting of the washer.
Me: Ok, I have the top panel off.
FIL: Anything loose wires? Anything out of sorts?
Me: Nope. Everything looks like it should I guess.
FIL: Wiggle around some of the connectors and make sure they aren't just slightly loose.
Me: AHHHHH CRAAAP!!! I JUST GOT THE HELL SHOCKED OUT OF ME!
FIL: I seriously had to tell you to unplug it first before you took the panel off and started touching wires?
Just recently I remodeled our upstairs bathroom. Put in a new double sink vanity. Had to rerun the plumbing to get it to match up to the sink locations, new light fixtures, mirrors, etc. Hadn't remodeled the bathroom in almost 20 years at this point. Super stoked about getting the old vanity out and this 300lb vanity in. There was an old medicine cabinet that my wife wanted gone. I take this out of the wall and there is 2x4's framing it in of course. Knowing that I need something to screw the new replacement drywall into I scored 3/4" all the way around the drywall that was butted completely up to the end of the 2x4's in this rectangular opening in the wall where the medicine cabinet was. Cutting the drywall off the 2x4 was no problem with my fancy-smancy Dewalt oscillating tool. Man oh man is this STRAIGHT and going to be AWESOME when I cut the new piece of drywall to fit. VERY LITTLE MUDDING going to be necessary on this one!

One small oversight on my end. Above this old medicine cabinet was a shelf on the wall. Somehow I didn't notice it. Also didn't notice there was a solid glass candle holder up there that was the size of hand grenade. Needless to say the vibrations caused by oscillating tool caused the candle holder to vibrate to the edge of this shelf and come crashing down. Luckily it whizzed by just missing clocking me in the head. Unluckily, it went RIGHT THROUGH the porcelain sink in the vanity I had just put in.
