Jabba decides Luke is just some loser.
Luke is dropped into the Rancor pit.
Luke appears to be vastly outclassed. This foe is fearsome and many hit-died.
Yet, due to a giant femur and a clever use of the local environmental features, Luke remains undigested and the Rancor has a giant gate shoved through his rancorous head.
Jabba must thenceforth and thereby devise an alternate form of execution.
(campaign idea: PCs captured. Villain tries to execute PCs with monster. PCs defeat monster. Villain tries to execute them with new monster. PCs fight next monster and probably win. This goes on until PCs are 20th level.)
Anyway, the Rancor fight--this is how a fight should go. You are weak and are supposed to die but you don't because you play smart.
So, I herewithbyforth issue this CHALLENGE in hopes that all will be illumined by its multicolored and bedazzling ludological insight...
Model Luke's fight with the Rancor as it went down in Jedi, in a system of your choice in such a way as to demonstrate that system's features.
Risus? FASERIP? AD&D? WFRP? GURPS? BRP? Burning Wheel? Tunnels and Trolls? Let's see it! Any system incapable of defeating the Rancor is hereby declared invalid and badwrongfun now and for all time.
Kiel Chenier has done it for Type IV as follows. (Kiel I have re-purposed your G+ comment for public consumption without permission. If you for some reason object, speak now)...
Luke is without a weapon, so his unarmed attacks deal 1d4+2 damage.
Luke falls, taking 1d10 damage. He moves back 2 squares.
The Gammorean retreats 4 squares. Fails diplomacy check to be released.
The Rancor moves 4 squares. Uses Bite on the Gammorean (4d8+6 damage). Gammorean is killed.
Luke moves back 2 squares. He picks up a bone (1d6+5 damage), and readies an attack action when the Rancor attacks him.
The Rancor moves 5 squares and uses 'grab attack' on Luke (1d8 damage, target is restrained). Attack is successful.
Luke jams the bone in the Rancor's mouth. (Jamming a bone in a mouth would either be an attack on the monster's Reflex, or just a dexterity check. Either way, would take a standard action.) Luke is no longer restrained. Rancor is immobilized. Save ends.
Luke takes 1d10 falling damage. He moves 1 square under the rock outcropping, giving him cover. He makes a stealth check (+2 from the cover).
Rancor has no ranged attacks. Fails his Perception check. Saves against immobilization.
Luke holds his action until the Rancor attacks.
Rancor uses 'grab attack'. Fails.
Luke picks up a rock as a minor action (1d6+3 damage). Attacks the Rancor with it (hits). Then moves 6 squares to the exit. He incurs an opportunity attack from the Rancor (Rancor misses).
Luke uses a minor action to open the inner door. He makes a strength check to break the bars (fails).
The Rancor moves towards Luke (can only move two squares due to his size, squeezing through the doorway).
Luke picks up another rock as a minor action. He throws it at the door controls, making a dexterity check (Natural 20).
The door shuts on top of the Rancor (5d10+10 damage. Maximum because of the critical hit).
Rancor falls below 0 hit points. Dies.
It was over in six rounds.
As originally written, Luke is a 4th level Jedi and the Rancor's a 3rd level brute--but when I pointed out that the Rancor has to outclass the PC or it's no fun Kiel said you could just scale up the gate damage and make the Rancor 2-4 levels higher than Luke and it'd all still work out.