Suspension bondage is a form of sexual bondage where a bound person is hung from one or more overhead suspension points. It carries a higher risk than other forms of sexual bondage. Stimulation In partial suspension, the person is bound in a way that part of their body weight is held by suspension ropes, cables or chains. The classic partial suspension position is to have the person balancing on one foot with part of their weight supported through a chest harness and the other leg pulled up in some direction. A person lying on their upper back with legs tied upwards to a suspension point to pull their lower back off the ground would also qualify as partial suspension. In full suspension, the person is completely supported by suspension ropes, cables or chains, and they have no contact with the ground. The position of the person's body in a full suspension is only limited by their endurance and the skill of the binder. The main effect of suspension bondage is to create a heightened sense of vulnerability and inescapability, so that the subject is made to feel that by attempting to free themselves, they may fall and hurt themselves. This is meant to create a form of mental bondage. Being suspended, especially in a large open space, also creates a sense of objectification, submissiveness and erotic helplessness for the subject, which can be erotically stimulating for them and for those observing them. Rope suspension is sometimes done as performance art at BDSM conventions and fetish-themed nightclubs. Suspension can alternatively create a sense of liberation in that one can glide around the room, and some styles of rigging are optimal for the suspendee to have control over their spin rate, body position, and general activities. Trance-like states are also common, resulting alternatively or simultaneously from the sensations of anti-gravity, the heightened awareness of one's body, and the sacrifice of one's natural physical strengths. Self-induced suspension bondage may involve autoerotic asphyxia. Three main positions The three main suspension positions are vertical, horizontal and inverted. Vertical suspension This primarily involves the person being lifted from the ground by their wrists. This is usually achieved by use of rope or by special suspension cuffs. When using rope, extreme damage can be caused to the soft tissues of the wrists, as well as reducing circulation, so being suspended by ropes can only normally be achieved