Most obviously, Frost's poem "Out, out-" employs techniques to make the buzz saw appear alive. Onomatopoetic words such as "snarled" and "rattled" allow the reader to hear the noises of this beast that seeks human flesh. Thus the saw becomes, for the reader, a horrible beast.
The effect of this horrifying beast is made clear through imagery. First, the original scene is one of an idyllic farm set against the majesty of the mountains. The "beast" intrudes, attacking without warning. This reality makes everyone a little more nervous and afraid. Freak accidents DO happen; we just don't think they will happen to us!
Next, the speaker of the poem becomes more and more intense as he describes the scene. What begins as an objective comment on the farm life of a family, ends up with the description of a severed hand and the young boy's slow transition from disbelief to fear. Ironically, he pleads for a hand that is already gone:
Don't let him cut my hand off—
The doctor, when he comes. Don't let him, sister!
The scene is one of gruesome finality, with the blood reminiscent of Lady Macbeth when she continually attempts to wash unseen blood from her hands.
As the poem ends, the reader is stunned to see that the family spends little time mourning. Life goes on. While not gruesome, the idea that one's life can be so easily ended and then forgotten is, in itself, horrifying.