Coffinmaker: I don't believe in a minute that you did any of the things mentioned in your original post, it was that other guy that you heard of doing the gaff-I believe ya.
Now I'll admit of a few, such heating a old Hoppe's bottle nearly full of 75/25% bottle of Balistol in the kitchen microwave so the contents would mix better, having the contents explode within the microwave. Mrs not happy at all. Then there was the time I was going to show my Police Chief the fun and accuracy of a muzzle loader rifle only to leave the caps 8 miles from home. The time I casted up close to 400 .454 round balls for my 44 cap and balls, had them in a large plastic bowl. Well had the bowl of balls sitting on a ledge in the shop where they shouldn't have been placed. I'll tell ya, on yer hands and knees picking up nearly 400 lead balls that have rolled everywhere, under everything, and in hard to reach places "ain't" fun. In fact just found one several weeks ago nearly two years after the occurrence. Have a few kitchen stove counter episodes I did/attempted with the Mrs gone only to be severally reprimanded for doing so. Hot bluing a percussion revolver, melting lead/casting when first starting out in the shooting of c&b guns, few others.
Never really any big loading boners. Double dropped a 2.8 grain charge of Bullseye once in a 38 case just to see what a double charge would looked like. Poured it out and set the case back in the loading try, but forgot to drop another 2.8 grains in. Seated the wadcutter bullets, then to my horror remembered the gaff of not recharging the case. Sat there looking at the fifity rounds in a container wondering which one it was. Sooo'---started weighing each one looking for one approx. 2.8 grains lighter and after about 20 of them found one, pulled the bullet and thar it was. One other time and I'll tell ya right now it won't work is when loading 44 Colt blackpowder rounds is trying to seat a .452 diameter 45 Colt bullet in a 44 Colt case that is sized to take a .430 bullet Mighty tight!!! The first one told me something was terribly wrong. I reload using a single stage RSBS Rockchucker and bench mounted powder dispenser, hand held Lee Primer and am happy as a dog in a butcher shop with it. No issues as Coffinmakers to contend with.
Coffinmakers reported 'non-personal' story reminds me of a time while serving as a LEO in one of the towns I was hired to clean up main street. (They gave me a broom and dustpan, used them to effect and left).
Anyway a friend of one of my fellow boys in blue told him about his neighbor across the street who was known in the community not to be overly endowed with brains, nor his wife. Anyway 'the neighbor' had his pickup parked on the street in front of the house and as the guy across the street watched reading a magazine. He advised he observed from across the street his neighbor come walking out of his garage with cans of oil, a filter, several wrench's, and a oil pan and proceed to change the oil in his pickup. Thought that wasn't really the best place to do it, but just kept reading his magazine. The magazine neighbor advised he looked up and noticed that there were empty oil cans laying next to the pickup of his neighbor and watched as his neighbor inserted the pickups dip stick in, pull it out, and then walk to his garage and bring back another can of oil, poured it in, check with the dipstick, go back into the garage, return with another can of oil, poured it in, check with the dipstick, then walk back to the garage, and returned with another can of oil.
The magazine neighbor advised that this was nothing but a Chevy V8 and the max they use is five quarts. He advised he hadn't been paying a whole lot of attention, but now his interest was really in tune. He said he looked close under the pickup and there was a stream of oil running down the street (which had a slight slope to it) and his neighbor was in the process of dumping another quart into the engine. He advised he whistled at his inept neighbor and pointed at the oil running down the street and advised the guy that he didn't put the plug back in the pan. The magazine neighbor said his neighbor looked under the pickup, scratched his head, and looked back under the pickup. The magazine neighbor said that any regular guy would have figured after five with nothing on the stick that something was amiss, but not his idiot neighbor, who after inserting the plug had to go out and buy more oil. The incident got turned into city hall and the oil changing neighkbor and his wife were reported to have been out on the street the next day with oil dry and pails of water with cleaning solution and brushes in lieu of facing any charges for polluting the city streets. The gaff of some guy you reported on Coffinmaker is 'nuttin' on the stupidity curve as this, but as you reported-it was a mess!!!