All part of learning.
I have seen a pair of scissors with a hole blown through one of the blades.
I was told that " if you want to check if it is live mains you can use the back of your hand"
If you see a "sparks " up a ladder with his hand in his pocket , he is not a lazy ***, it is so he cannot grab an earth if he finds the circuit is live.
A good idea in the domestic scene is when working on a circuit, if possible, put the fuse in your pocket to avoid anyone possibly reactivating what you have just disabled.
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