Sheldon tries to make friends by following the principles that Dale Carnegie has outlined in his book, "How to Win Friends and Influence People." His conversations are robotic, not authentic, and awkward as a result.
Chuck has a short argument with Wilson on their ability to make it off the island alive. It appears that Chuck responding to Wilson's non-existent comments. The argument ends with Chuck throwing Wilson away and soon regretting it. He desperately looks around to find Wilson, as Wilson is his only friend on the island, and he eventually finds him.