Parabounce is a concept that allows people to bounce and fly around using their own individual helium balloons. Las Vegas seems like the perfect place for an attraction like this, and so the Parabounce people are planning on opening a "100,000 square foot “bubble style” dome where up to 20 flyers can simultaneously float, soar and bounce in individual, 22-foot, Parabounce helium balloons."
Source: Business Wire and Parabounce.