It's not Halloween, but I just had to share a horrible experience...
It all stems from my dad losing property here in Phoenix. Stubborn about letting go a couple old pickups ('70 F250 and a '71 C10) -- and without researching or looking at reviews, he picked a local Arizona engine rebuilder and had the trucks towed there.
These self-proclaimed "masters" of engine rebuilding did as bad a job as I've ever seen. My dad and I have managed to drop a new engine in over two weekends... who knew this experience would last half a year.
After they finished, we looked it over, and I made a video of how bad they had done. The video is long at 20+ minutes, but it definitely outlines how bad things can be if someone makes a bad choice in engine/machine shop... and definitely a reason to consider learning/doing it yourself, if you have the means!
https://youtu.be/l4RoccDwltw