I usually check out a couple of Survivor fan sites after the episodes and one of them stated that it was 118 degrees out there during that challenge!! No wonder they were keeling over. I know that the crews that set up the challenges do a couple of trial runs to be sure that they work right, so you'd think that they would realize how difficult that was. I wonder if this will cause the producers to avoid this kind of thing in future. Maybe run it in the early am or later in the day when it's slightly cooler?
Several people had the opinion that since most everyone likes Caleb and wants to see him again, and he seems to be a good player that he will be back soon. Like VERY soon...the guess was that since it played his comments about being ok and wanting to come back but didn't actually show him saying it, that he might be out filming the show currently in production. (I can't figure out a timeline for when it would be, as the season currently being shown was actually filmed before the Cambodia season that already aired, so I'm not sure that would really work out time-wise.) Anyway, that is just speculation, so not a spoiler.