A singing birthday card featuring a chorus of cat voices meowing out the words to 'Happy Birthday' garnered a spectacular reaction from the feline it was presented to -- although not necessarily the intended one.

The instant the card is opened and the scratchy serenade begins, the birthday cat athletically leaps from across the room and attacks the gift, wrestling and clawing at it until the music thankfully stops.

Check out the relentless and hilarious assault below.

[via The Huffington Post]