You go down to pet the puppy, but before you can say "Holy crap! That freakin' pup is mutating into a freakin' monster pup! I'm now going to stop trying to pet this once-cute puppy, due to the fact that it is now a behemoth of a creature," it becomes a behemoth.
It bites a chunk of your stomach off. You think to yourself, "Whatever... there are people without tummies in this world, right?" By this time, you've already lost most of your blood, causing your delirium. The beast grinds its teeth into your leg. You wonder what's for breakfast. You start to sing some show tunes. You realize your life-long dream of being eaten alive.