No biggie, this happens all the time.
Every so often I deem a toy worthy of hoarding and will take the fluff and squeaker out of it so that the "carcass" is still enjoyable for my dogs. As this was on of my dogs' favorite toys, it made the cut of an afterlife. So I grab my knife, cut a slightly bigger hole in the toy, and proceed to de-fluff it at the kitchen counter. About 30 seconds goes by and my ears are met by a piercing shriek of dog-scream. I look down to see that both of my dogs are sitting next to each other, looking up at me.
Again, no biggie, they always strongly desire that which they can't have. Food, phones, food, or toys.
I de-fluff some more, remove the squeaker, squeak it where they can't see to get the typically cocked dog's head of confusion, and continue de-fluffing. Not ten seconds goes by and another cry of what can only be described as K-9 terror comes out. And then it hits me.
From my dogs' point of view, they were having a jolly time with their best friend, wounded him and awaited my return to tend to his injuries. Rather than helping their dear pal of two years, I grabbed an exacto-knife, gashed his throat, and viciously tore his guts out through his now gaping neck wound. Then when I pulled out his voice-box and forced his entrails to make a distorted version of what they knew to only be a friendly voice of play.
I am a monster.
But...they're worse. Currently they're playing tug-of-war with his empty, lifeless carcass.