The reciprocating saw. Sticking to the laws of physics since day one.
Gather, friends, and pass judgment! For over there sits the circular saw. BOOO you might say, and we might BOOO as well! Why, cries the neophyte? Why, indeed. For is it not known to all that a point on the outside of the circle must, by virtue of increased distance, travel farther than a matching point on the inside of the circle, even though they somehow stay equally paired? How is this possible? Are the dots moving at different speeds? Then why do they always line up on the same plane? The answer, quite simply, is that a circle is the purest witchcraft.
Better to stay with a reciprocating saw. It gets the job done quickly and stylishly, and by moving in a forward/backward motion. Yes, that's right, like a child swinging their arms and running at you. Ha ha! What a fine analogy! Anyone can understand that! Unlike so-called "angular momentum" puzzles, which are the sort of things only a wizard can truly understand.
Keep to the straight and narrow. Keep to the reciprocating saw.