I caught a crawdad when I was six...we brought him home in a pop bottle and left the bottle on our porch, then we forgot, and he fried bright red in the sun...I think we gave him to the cat...I really wanted him for my fishbowl.
I admire you, spud; goldfish don't die easy, they can take a lot of extremes. A few years ago I dug a hole in the yard and lined it with plastic, and put in a little pond, then I dumped ten goldfish in; but there was a hole somewhere, and the water drained out, and I didn't find the poor goldfish until later that day...meanwhile, they had been dry, stuck to the bottom of the pond, and were actually getting stiff.
I peeled the little guys up, and dropped them in a glass of water...they didn't do anything for a few minutes, but about an hour later, they were swimming around, just fine...maybe a little sunburned, that's all...
I have rescued goldfish from cold weather before (I have a little store-bought pond now), and even though their water was nearly freezing, they thawed all right, and made it through the winter in my house...
But no, they don't like to be frozen or boiled.