The Scorpion King and Rick are fighting, and they are knocking the fire over. The Scorpion King jumps over the fire, and the spear bends sideways. The Scorpion King is on one side of the fire and Rick on the other side.
In the commentary, Steve Sommers and Bob Ducsay joke about this. Throughout the movie, they point out everytime you see could possibly see a bent sword, during the fight scene in the mansion there is one, and also a good sword-under-the-armpit.