Serious issue here 'The Black Mountain's Burden: having arrived at the Black Mountain for his first time, Gigue has yet to accomodate himself to its foreign energies, and as result, the Aura of Hyperarmor is malfunctioning, appearing as a solid, inflexible carpace which renders him immobile while it is active.'

Either that shield should not be able to activate while in mid-air, your character should lose all momentum mid-jump and fall in the stream, or your character should be unable to prepare for his fall due to his muscles seizing up and splat onto his face.