I am reminded of my freshman year of college, which was the first time I had my own voicemail box.
I wrote a little script for me to follow, and recorded a track of me speaking on my computer. Then, I recorded my voice message with me essentially arguing with myself as the voicemail, as to who was the real me.
It was quite funny - I would usually get 2 voicemails after that: one of a person laughing and hanging up, and one of the person calling back to leave their actual message.