Fun vs. Physics

Setting aside the whimsical yet intriguingly implausible scenario that is the very quiddity of Angry Birds Space ~ fowl and swine zinging through the macrocosm ~ there's the grave matter of gravity vs. matter to consider: http://www.sciencenews.org/view/generic/id/339709/title/The_Newtonian_physics_%28or_not%29_of_Angry_Birds_Space