Unwitting Jockey

This spell conjures a spooked horse under a selected humanoid target.  The spooked horse always appears facing a direction opposite the caster and immediately bolts at top speed.  The un-willing rider gets a Dexterity saving throw at disadvantage.  A failed saving throw results in a 120 foot spastic horse ride while facing backwards on the hysterical mount.  The mount vanishes after reaching a physical barrier or traveling 120 feet.  The sudden disappearance of the mount will drop the unwitting jockey to the ground for 1d4 hit points of falling damage.  Targets that save successfully are able to quickly dismount and avoid being dragged away from their current location.

Any spellcaster targeted by this spell that is actively concentrating on a spell must make a Constitution Saving throw against the the caster's save DC or break concentration on any active spell.