I'm not mechanically inept, but my range of experience in home-maintenance tasks is not large, and mostly clustered around either calling in experts to do projects that most people would not undertake themselves, or things involving adding or removing a relatively small number of nails or screws. I recently repaired, rehinged and rehung two shed doors without difficulty, that's about my usual scale.  

So replacing our water-hemorrhaging "food disposer" (didn't these used to be called "disposals"?), which involved both plumbing and electricity, seemed like the kind of task that could descend into total chaos about halfway through, when some minor piece of the replacement apparatus proved incompatible with some intractable facet of the existing environment.  

Somewhat to my disappointment, the replacement went really easily. The old corroded hulk gave way without much complaint, the new one slid in with equanimity.  

The only interesting part of the task was tracking down the source of a strange trickle of water that appeared to be coming out of a wall where there was, as best I could tell, no plumbing at all. It turned out that the old unit had been leaking water into the flex-pipe for its own electrical cables! Not only is this obviously bad, but the constrained space made it an interesting topological puzzle to get the several ounces of fetid water back out of the pipe.  

But even if the tasks were ultimately simple and only trivially grimy, and probably a Real Man would have sucked the water out of the electrical pipe without even turning off the breaker first, I note for the record that in this upgrade I have gone from a third of a horsepower to three whole fourths, and I think we can all agree that that basically reeks of machismo.