Heard a variation on this theme the other day which too, sadly, made me laugh...! But then I'm sure the pilot who was scattered would've thought the same.
Same principle, bag thing fashioned out of plastic speedtaped to side of a/c and then released with the aid of a wire through the DV window of an Aztec. Sure enough all goes to plan (thankfully as wife and kid were on board!) and everyone departs the airport happily (well, sadly, but you know what I mean...)
Cut to pilot walking around to other side of aircraft only to find all of said pilot smeared all over the tail!!
Final resting place, the a/c wash bay at XXXXXXXX!
I bet he laughed though!