You totally didn't hear whatever Luna was blabbing on about. Probably some stupid girly thing like tampons or feminism. When you get into the zone, you totally get into the zone, man, so you quick pick up the bowling ball and lob it at Spark.
Given that the bowling ball is twice as heavy as Spark, the cat's body crumples immediately, his flattened form spewing out blood, guts, and viscera all over the place. Ha ha! That'll teach that little furry fucker not to alliterate obnoxiously in THIS household!
Unfortunately, you forgot that Luna was standing right near you and actually kind of likes the cat. She storms out of the room crying, grabs some things, and leaves the house, never to be seen again. You figure, "Heh, bitches. Always more fish in the sea" and that you'll have a new girlfriend by the end of the week. Instead, you eventually die, alone and unloved, especially once the angry mob consisting of the survivors of McGuffin arrive because you kind of forgot about that whole zombie thing.
YOU HAVE DIED