I wish I still had the pictures, 4000 amp main breaker, with a piece of a 2x4 wedged under one of the tabs on the pole shaft (the part where all the contacts are connected that controls the opening/closing) relays we're all turned to the max, that wasn't good enough, so wedge the breaker closed..... All the buss work in the gear was blue/black. Most of the epoxy insulators were melted. This was a massive electroplating shop in so cal. They ran a forklift into a piece of buss duct damn near burnt the place to the ground. The whole facility was fed by a 10000kva transformer pumping nearly 100,000 amps of fault current.
I was working in a machine shop in San Leandro CA when one of the forklift drivers was running through the fab shop way too fast with his boom all the way up. He took one of those huge gas heaters off the ceiling, completely split a 1" gas pipe in half right above the spinning lathe. It made a really loud hissing sound followed immediately by the sound of 25 or 30 fat old machinists running for the closest exit. The only time I saw those guys run faster was when the boss announced free pizza in the lunch room. I still don't know why that place didn't blow up.