I saw someone mentioned the bloody eagle, and I thought I'd elaborate. The bloody eagle is a method of torture/execution by the vikings. The ribs in the back or sometimes the front are cut and cracked so you can see inside. There are a few different ways for it to have the appearance of the "eagle" the first would be that the crack the ribs in a way that they stick out significantly in the back causing the apperance of wings. The other, even worse way, is to pull the lungs out the back of the person, stretching them out and then pinning them upward. Despite what many people believe the person did not die instantly. If they did the lung pulling version it was usually only after the lungs were stretched that the person died of suffication, though sometimes people died of blood loss before that point.