Dameon Harris of Nevada gets used to the controls of a bulldozer at Dig This October 27, 2011 in Las Vegas, Nevada. At Dig This, tourists take a short class and can then operate full-size hydraulic excavators and track-type bulldozers in a giant sandbox while being guided by instructors over headsets. (Photo by Ethan Miller/Getty Images)

A model backstage before the Issa London runway show at London Fashion Week Spring/Summer 2012 on September 17, 2011 in London, England. (Photo by Tim Whitby/Getty Images)

A model showcases designs on the catwalk during the NE(degrees)¤TIGER Couture 2012 on the second day of China Fashion Week Spring/Summer 2012 on October 25, 2011 in Beijing, China. (Photo by Feng Li/Getty Images)

A grizzly bear eats a frozen fruits during a hot summer day at Rio de Janeiro's zoo January 13, 2015. According to a local climate institute, temperatures in Rio de Janeiro on Tuesday rose up to 34 degrees Celsius (93.2 degrees Fahrenheit). (Photo by Sergio Moraes/Reuters)

A model poses at the Le Silla Spring/Summer 2012 presentation as part Milan Womenswear Fashion Week on September 23, 2011 in Milan, Italy. (Photo by Vincenzo Lombardo/Getty Images for Le Silla)

A model walks the runway during the Jean Paul Gaultier Ready to Wear Spring / Summer 2012 show during Paris Fashion Week on October 1, 2011 in Paris, France. (Photo by Pascal Le Segretain/Getty Images)

Models showcase designs on the catwalk during the SCFASHION Qi Gang Spring/Summer 2012 show on the Fourth day of China Fashion Week Spring/Summer 2012 at the Banquet Hall, Beijing Hotel on October 27, 2011 in Beijing, China. (Photo by Lintao Zhang/Getty Images)

A model walks the runway during the Neon Sao Paulo Fashion Week Spring/Summer 2013 Collections Show on June 14, 2012 in Sao Paulo, Brazil. (Photo by Fernanda Calfat)