Those 2 that lost the sling were idiots, they were in water much too deep to try using it for the first time, plus she should have used something to tie it to her wrist to prevent what happened. A COSTLY error. Rupert was probably yelling at the TV when that happened. If he was on the raft with her he wouldn't have said - Aw that's all right, don't worry about it.
Oh yeah, I would have stomped the gal for losing the Hawaiian sling. Enough to actually throw the immunity challenge and switch her out for Brian.. Then again, don't know if that was shown in order or not - that might have been after the immunity challenge too.