Edit: In addition to Gratswords and Shortbows, I can confirm Staffs and Hammers behaving very similary, albeit less notable as the rotation is not as violent.
Item: Forged Glider [Gems Store]Race: CharrGender: MaleProfession: any Greatswords and Shortbows on the Back start to float around in a loop while gliding on the Forged Glider. [Video]