When you leave a voicemail do not use your full name because that immediately raises a red flat that you are a salesperson making a cold call. Instead, say your first name only followed by your company name. This will make your customer feel that you are much more familiar with each other than you really are. Saying your last name would defeat the whole purpose of demonstrating familiarity.
Funny voicemail greetings are just that. These types of greetings have no rules whatsoever. They’re just for funsies, so make those you care for the laugh. Most of the time, they are personal, but certain businesses can use them as well. Perhaps you operate a theatrical costume company that specializes in clown memorabilia, or perhaps you run a business that sells pranks, such as plastic puppy poo, and whoopee cushions.

Even if this explanation is accurate (i.e., the clip originated as a message left on a Jack in the Box employee’s voicemail), it doesn’t preclude the possibility that the accident described never took place, and the recording was just a prank one employee pulled on a co-worker.
Hi! I told you never to call me at this number. But since you did, I left the knife on your back porch…Check to see I got all the blood off. Don’t forget to leave a message, and we’ll talk about the…plan.