Technically anything I break at work product wise didn't really cost them anything because I work at a thrift store (though obviously lost sale and what not but still). I uh almost broke the floor cleaning machine though.
My Coworker was mostly in charge of using it, but only once a week, and kept the water full and ultimately caused the water to start to smell because it didn't get cycled properly and the floor cleaner is a neutral PH so didn't kill whatever was making it smell.
Well continue this for a few months and eventually as he cleans the floor the whole store starts to stink. So his solution was to just dump a gallon of the neutral cleaner into the machine and it still didn't stop the smell.
Well no one knows how to service the machine in the store, and not only have we somehow lost the manual, but I'm the only person in the store who bothered to read the manual when we had it (side note here, the bottom of the machine is supposed to be taken apart every 2-3 months and cleaned... it hasn't been cleaned in like 4-5 years lol), so I'm tasked with figuring out how to drain the machine and clean it out.
I fiddle with it for a bit, and have a guess of how to drain it, but decide against draining it down the sink in the store as I didn't want to deal with the smell. So I take it out of the back of the store and out the garage door. I forget to account for the fact that the machine is designed for flat floors and clip the pavement as I take it outside with the bottom of the machine which throws it out of whack.
I let go of the machine and go to realign the front, and then realized that I neglected to remember that the pavement on the side of the building was slanted and the machine started rolling away from me. I ran and caught it right before it fell fully into the ditch next to the building, but not before the front end takes another hard hit and I can't get it to line back up right.
I park the machine in a way it can't roll, figure out how to drain it, run gallons of water through the machine to clean it, and then brought the machine back on, again clipping the edge of the garage as I came in while my manager was around. Only then did I react to the machine not moving correctly and tried to fix it again, before telling my manager that something is out of whack and I don't know how to fix it.
They called the company maintenance guy and he was able to fix it. So it's not like it cost anything to fix, but still :P