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.
Telling a quick joke or including a little more information can keep you safely within the 20-second timeframe while letting the caller understand a little more about you.

I think it’s a sad reality that most organizations use a telephone system to screen and triage phone calls before transferring the call to the appropriate person – forcing an electronic interaction that isn’t always customer friendly.
This type of service can be very beneficial as users are still able to craft their own messages, while a professional reads them. In doing so, companies can spend more time on the scripting process, making sure the text conveys everything they want it to. As such, companies may bring in expert teams to draft, revise, and/or finalize the script itself. The bottom line is you can take more time to get the words right. Additionally, in working with a professional voice talent, you are ensuring your words have the utmost impact—i.e. the words are read perfectly with the right tone, resonance, pacing, etc.