Angry Bird Physics is a unnatural video game science (unrelated to real life gravity, friction etc.) that involves the study of matter i.e. angry birds and pigs 1
and its motion of angry birds through spacetime, along with related concepts such as energy and force at which the pigs are hit. The law of normal physics does not apply to the angry birds or their counterparts. Unusual anti-gravity and resistance to friction has been observed by both subject matter see: Robbed.
Angry Bird Physics: (1) when birds make contact with pigs with no detriment or fatality. (2) objects such as wooden beams, rocks and ice blocks staying in place after a strong opposing force has made contact. (3) Heavy objects that weigh upon pigs with little or no effect.