Ill give you a cracker, but you must have the basics before trying it you also need a partner of the same or simular standard. Get two valcro headbands and 4ft of elastic rope tie the velcro to the headbands, then each of you put them on. the secret is to always have tension on the rope and both move with your eyes shut. At first there will be a few problems with distance but given time it will give unbelievable awareness and speed, also oral perception its a cracker.