Bachelors and bachelorettes, including Erica Rose, Tenley Molzahn, Michelle Kujawa, Arie Luyendyk, Graham Bunn, Kasey Stewart and Natalie Getz, tackle obstacles that include the Beaver and Beaverettes, Gym Class and the Big Balls on “Bachelors vs. Bachelorettes,” the newest episode of “Wipeout,” airing Sunday, Aug. 3, 2014 at 8 p.m. ET/PT on ABC.