So apparently the U.S. version isn't the only one to push Houseguests too far.
On YouTube look for the video called "Kibe Loco - Juliana desmaiando (BBB)"
Even with no Portuguese I think we can follow what's going on. They lock them in some kind of clear plastic tube as part of some kind of endurance test and the woman goes into some kind of panic attack.
What amazed me is that Brasil is actually in their 8th edition.