I was thinking that perhaps he somehow offended the rabbit, and its descendant later sought revenge.
Aggrieved Rabbit: “Hello. My name is Bun-bun Montoya. You maltreat my great-great-great-great-great-great grandfather. Prepare to die!”
“Bun-bun”? You a Sluggy Freelance guy? Have you read the John Ringo books? You know the aliens landed in Fredericksburg and killed us all, but at least we died bravely.