That joke appears, of all places, in “The Decameron” by Bocaccio, written around 1350. Given that “The Decameron” appears to be mostly a compilation of existing stories, it is very likely that that joke was older than that (and, at that time, it was much more biting than nowadays – the problems with Church corruption and all that were much more blatant than today).
Now, my contribution:
Three saintly old priests (or ministers, or whatever – you can freely choose your priestly denomination at will) die and go in front of St. Peter (or whoever keeps an eye in the entrance to the afterlife in your particular cultural environment).
St. Peter checks their files and says: “Oh, my – there has been a mistake. You were not supposed to die today, but a month from now.” The priests say: “Oh, what are we going to do then?”. St. Peter says: “No worries – tell you what: In order to compensate for the inconvenience, I have this proposition… You will be sent back to Earth to live for one month over there, and you will be incarnated in whatever form you wish to have. Also, whatever you do during this month won’t count against you when you come back here. What do you think?” “OK!”, say the priests.
St. Peter approaches the first priest: “So, my son, what would you like to come back to Earth as?”, and the priest replies: “Sir, I always dreamed of being able to fly and soar over the mighty mountains, enjoying the freedom of the air”. “Very well! So be it!”, and the guy is sent back to Earth.
St. Peter talks to the second priest: “And you, my son? What would you like to come back to Earth as?”, and the second priest says: “Oh, Sir, I always wanted to be able to run like the wind, to enjoy the open spaces and the wonders of nature”. “Very well! So be it!”, and the second priest is sent back to Earth.
St. Peter talks, finally, to the third priest: “What about you? What would you like to come back to Earth as?”, and the third priest says: “Well, let’s see… You said that, whatever we do, this month on Earth won’t count against us?” “Yes, that is what I said”, says St. Peter. “All right”, says the priest – “I want to go back to Earth as a stud, the best there is!” “So be it!”, says St. Peter, and the third priest is sent back to Earth.
One month passes, and the secretary angel goes to St. Peter and says: “Sir, remember those three priests who died before their time? I think today they are scheduled to come here…” “Oh, yes!” says St. Peter. “Let’s see, can you tell me where they are right now?” “Yes, Sir” says the angel. “Here I have the information…”
“The first priest is an eagle, flying high above the Alps”.
“Very good”, says St. Peter. “And the second?”
“The second priest is an antelope, running through the African Savannah”.
“Good. And the third?”
“The third is in a truck’s wheel, somewhere on the Rockies”.