I am convinced that this was not in the script. Matt was supposed to jump on the hammock and missed, because he’s Matt and he is a danger to himself and others, and this line was just an expression of his confusion.
Your empty spaces are always mean't to be filled. There's empty spaces in your brain for more knowledge to come, so what's the problem with having some space in your heart? It just means that you have enough room to grow and love everyone.