The game is built of reflexes and illusions and goes along the lines of;
Each player recieves three ducks. These ducks are picked off one by one, until there is one person still holding poultry. Simple. Somewhat like Russian Roulette.
One of the ways the ducks get picked off is by a Jack-in-the-Box (or JitB). The first two JITB sketches turned out rather duck-like (with the exception of the classical JITB at the bottom). I figured, if a Jack is going to be cutting off heads, surely a scissor like beak would make it all that easier? But then teeth are equally as cool.

Duck.

Duck.

Goose.
That said, these sketches don't reflect the final JitB in the skit, as that one had claws and appeared to pounce/prowl.
*EDIT* Explained a little better.