Challenging swallowing

Once I observed on Red River the picture when a pelican caught and tried to swallow quit a big fish. Fish was definitely too big to go through his throat. And it looked like fish understood this situation and was not afraid - fish was not fighting at all ... The finale was surprisingly unfortunate for the bird and lucky for the fish - failing to swallow such a big guy and being very tired after about 5-8 minutes of fight pelican had to spit out happy fish.