Big Brother's endurance competitions are no laughing matter
In the past, Houseguests have clung to ropes, walls, and ice in order to stay safe in the game. Some of the show's most memorable challenges have even lasted for hours.
Did your favorite BB competition make the list?
Check out some of the most grueling endurance comps from Big Brother's long history.
Stream full episodes of every past season of Big Brother on CBS All Access.