Earlier in the episode, Shane had played a joke on Dermott by trying to hide his shoe in a high up tree branch.
The pair even had a few (very close) wrestles during the ep! Which is why viewers were surprised Dermott wasn't chosen to be his right hand man.
Is it possible the Aussie rules player chose Justin in a bid to make his mate jealous?
Maybe Shane and Dermott's bromance will be just enough to keep them in the jungle a bit longer.