Randy Wakeman's, "Backs to the Future" is a goodie. Jim Pace's "Alien Autopsy" was a shocking (and satisfying) presentational reworking of the Wakeman handling.
Also, the Kaufman, Dingle, Krenzel "Holy P.O.D." from the Almanac is killer! Although I'm not sure it fits this packet trick criteria. I've used it sparingly in banquet work and will share a morsel of my work on it for those who are familiar:
Load the selection with the Marlo handling (which is in the "Collected Almanac") but use the Original gimmick. Now, in picking up the packet of supposedly 3 cards, execute Kaufman's "Double-Lift Shift" (I think it's in a "N.Y. Symposium" book, although I'm not sure which) with the two card packet in place of a double. This sets you up for the ending and provides a nice convincing show of the packet containing three cards. Table the pack, and continue in the standard fashion.
I'm aware of how cryptic this reads to the Uninitated, but if you know the routine, this should smooth out some of the clutter.
[ August 26, 2001: Message edited by: Justin Hanes ]