Another one is when repairing a extension cord always make sure you put the correct ends on. once I put 2 male ends on and shocked myself.
Don't feel bad.
Once I repaired a leaky garden hose by cutting out the "good part".
I put a female connection on each end of it, and when I went to hook up the sprinkler I stood there staring with the sprinkler in one hand and the hose in the other.
It took quite a few seconds to realize how stoopid I was.
