[iamthepieman]

dropped a wrench across the terminals on the deep cycle backup batteries inside a telco switching center. Had to disconnect the whole bank of batteries to fix it because the wrench welded itself to the terminals. it wasn't a tack weld either.

[mauricemir]

The one I remember is decorators placing a paint tin across the bus bars - which explosively painted the walls

[gregpilling]

That makes for a very exciting day.