Cute Or Terrifying

On the face of it this handwritten note on the neighbours window is cute and funny. Pop some movie horror music on it, add a little backstory, and this becomes a terrifying note just before the killings begin again!

Swine Flew

[boom boom cymbal-crash] Thank you, thank you very much ladeez and genleman, I'll be here all night and may I recommend the veal, than-u verry much