When Zazoom returns to the cave hideout, the cave entry is a large, open doorway, but when Turhan and Fariik leaves on a flying horse, a descending steel door must first rise out of the way.
Near an oasis, Raseem drenches three of Vangore's guards with water from his water sack. It leaves the guards knocked down in a puddle of water. Water doesn't puddle up in sand.
Inside the cave, Fariik keeps a fire pit burning. A fire kept burning inside an enclosed space (in this case a cave with a door sealing the entrance) would be apt to fill with carbon monoxide and kill all those within.