Note the sequence in the PIP...I think perhaps Jonas could be at the injured person's side here....and then look at everyone else....to me, it sure looks as if the person that has pain has been removed at this point. And, look at Salani, perhaps Jeff has just been to camp to tell them that there has been a med-evac....they sure look sad, and what reason do they have to be sad?
Then, after those pics, we have Tarzan. Clearly, the pics of Tarzan are from the AM when they get their tree mail for the coconut toss challenge. We see Christina has already taken off her red shirt. The shots of Tarzan are from before the Coconut Toss RC where we know that he participates. So, most likely the med-evac is post RC. Note the sequence in the PIP:
Jonas, perhaps attending to the person who is down and in pain...note his expression and the serious nature of his appearance...
Now here are the others and their post tribemate removal shots...(perhaps?)
Christina, still wearing her red top...perhaps post removal...
Leif, right smack in the middle of the pip...
Then, here are the Salani tribe...looking like they are discussing something serious, as a tribe...
Kat looks very upset and sad...
Then, finally, they throw in pics of Tarzan, but as we can all see it is prior to the challenge...
One other thing to note is this:
From the overhead shots of the challenge site we couldn't tell....we thought the coconuts were supposed to be bounced into a pen. But, clearly with the PIP shots, we can see that the holding pen is actually a netted bullseye pen.