Psicobloc (pronounced psycho-block) is a form of climbing, also known as deep-water soloing, where climbers spider around boulders over deep water (or in this case a wall) without ropes. Psicobloc means psycho-bouldering in Spanish. I agree, it is a little psycho.
At the Utah Olympic Park in Park City, there’s a 55-foot wall built over a pool for exactly this purpose. Climbers from all over the world convene here to psicobloc. Built for competition, this wall hosted the first US psicobloc competition in 2013. In subsequent years, the event has been held in the summer (obviously) as a 3-day climbing event.