The killer stood by his victim, weapon poised, waiting for the right time to strike.  Bang!!  The victim’s legs still twitch and writhe; the job is not quite done.  Bang!!
“Sarah?” he said.
“Yes Carl?”
“I need to clean up in here.”  The victim’s innards are splattered against the wall; it’s almost artistic, thinks Carl.
“Paper towel,” Sarah said, handing Carl the roll.  “You sure made a mess of him.”
“That I did,” said Carl.  “I’m just glad he’s dead.”  And with that, he wiped the dead spider from the wall.