Had a manual electric in the 70's on porch of house get stuck in the on position and I noticed it late that night glowing at the joints. I cooked the elements-thankfully it was a bisque so I all I had to do was throw it all away.
More glaze batches gone wrong in the 5 gallon size than I care to admit or can recall.
Let a friend put in a 100 starfish shaped forms in a glaze fire (he was using them for annealing glass between forms in his glass oven) He said the clay was high fire. It was not . It was cone 6 so the piles of forms only slumped and ruined only some of my stuff.
I let a friend light my kiln as I was at the movies he blew the load over messing with the pilot and then turned it off- thank god.
I never let anyone since light it. That was in the 70's
Blown up so many pots in the earlier days pushing the limits I now know what I can do without harm.
Used the wrong fiber on a roof and had to replace it
poured a 1/2 bucket (5 gallon)of glaze into my shoes while not paying attention
Kept the low fire clay outside studio thinking it could never sneak into a high fire load-wrong again it did and it was a mess-had fun with a grinder and lost some work as well.
Threw in a bunch of green waste into a going glaze fire in 1979 to cone 10 and ruined the glaze load (kiln is not a trash burner)
Watched a friend put experimental things like tin foil in his high fire bowls in my fire and all his bowls where ruined(heavy hard learning curve)
Just remember I have a art degree and studied ceramics full time for 5 years and still made these errors. Ceramics it makes you humble.
I'm here today on this forum in no small part so others do not have to learn these lessons in the school of hard knocks.
Whats amazing is still folks are trying to use meat grinders as pug mills and galvanized wire instead of High temp wire and food kitchen items for glazes expecting good results. Its the horse to water saying for sure.Oh well the school of hard knocks always teaches best.
I have an advanced degree from that school after my BA in art was done.