Slisik is able to grab the spear and pull it from it's post, but not entirely unharmed. The heat and occasional sparks of molten rock, combined with the heat of the metal spear deal a total of 10 damage before Slisik can escape with the prize.
While Slisik waits it out, the room dips until the floor meets the flame (45 degrees) and then the slick substance is rinsed with the flames from below as they quickly move up the flammable grease substance. A minute later, the floor rises until it's level with the floor he's on, at which point the room looks fairly similar to how it did originally. With Errol and Jesme on the trigger, the door on the opposite end opens and holds while they stand there.