Burning a woman and her house:
"Go on," said the woman, and Montag felt himself back away and away out of the door, after Beatty, down the steps, across the lawn, where the path of kerosene lay like the track of some evil snail.” → simile (their act was evil)
Montag uses a flamethrower to kill Beatty:
“And then he was a shrieking blaze, a jumping, sprawling, gibbering mannikin, no longer human or known, all writhing flame on the lawn as Montag shot one continuous pulse of liquid fire on him.” → violent imagery