I once forgot to oil the lower rod bearing on a Husqvarna K760, and it was bone dry during first startup.
It made a "SCREETCH!!" noise after about two seconds, and a poof; a white puff of smoke came out of the muffler. Luckily I have spares, but it still cost me an hour to swap out.....
You know what really grinds my gears?
Some "anus" put 316 stainless screws in the muffler of this Dolmar, and then the heads got stripped out.
I sharpen my own drill bits, thankfully.
This pile of drill bits are dull now after spending 30+ minutes trying to drill the heads off the screws...