Had a nice POOF!! off a decom car recently in the shop.
People have been taking parts off the decom cars, and not insulating the leads that are left hanging. The shoes and shoe beams had not been taken off the decom pair yet, but the heat breakers had been removed for spares, and the line side lead was left touching ground. When the pair was horsed out of the shop to pump the poopies out of the bathroom, KABOOM!! Nice one!! Luckily, no one was near where it let go. The flash and carbon marks went about 3 foot radius.
Perhaps, before the program is done, we'll get smart around here and isolate the high voltage stuff immediately on the decoms. I guess this is rocket science??
Tom