Since the criteria was having done the task at least once, I am quite impressed with all those who checked yes for died gallantly and were still able to fill out the survey.
Ain't you heard? Dying is easy, comedy is hard. :D
But overconfidence aside, I have a harder time gauging acceptable competence levels in a test like this. Anyone who is not physically disabled is capable of shoveling manure. But if you don't know what you are doing you are gonna work way harder than you need to, take forever and wind up making a mess. Same with building a wall, just pile stuff up and brace as necessary, but the first rain or wind will probably knock it over.