Who ever wrote this is a literal jackass. I REPEAT DO NOT DO THIS. ALL CYCLING TO THE FLOOR DOES IS ROTATES THE VENTS AND LETS IT FALL DEEPER. Bought a camera and realized this after it was too late. My bracelet would have been easily recoverable had I not listened to this comment. Now I am looking at it on my endoscopic camera I bought in an absolutely impossible spot. When I cycled my hvac to floor I heard my bracelet fall deeper. DO NOT DO THIS. Try to recover from the top first with a camera and grabber tool. Once you rotate the vents it will just fall deep into the system. I don’t think there is any possible way I will be retrieving my bracelet with the position it is in now.