A shantak's hide is very slippery. A rider can dismount a shantak without any penalty to movement speed. If an effect moves the shantak against its will while a creature is on it, the creature must succeed on a DC 15 Dexterity saving throw or fall off the shantak, landing prone in a space within 5 feet of it. If a rider is knocked prone or unconscious while mounted, it must make the same saving throw. In addition, the shantak can attempt to shake off a rider as a bonus action, forcing the rider to make the saving throw to stay mounted.