the handfuls of fish that they are getting delivered by the trainer are all getting smaller. so they know they're coming down to the end of session. >> when you see the difference between the beginning of the video and the end of the video, you can see that he's just not quite on his game anymore. >> there's no food left. she kept asking him for more and more behaviors. he wasn't getting reinforced for the behaviors that he was doing correctly. he probably was frustrated towards the end. then she walked around the perimeter of g-pool. he followed her. and then continued over into the rocky ledge area where she laid down with him to do a relationship session, which is quiet time basically. tilikum at some point grabbed a hold of her left forearm and started to drag her and eventually did a barrel roll and pulled her in. may have started as play or frustration, and clearly escalated to the very violent behavior that i think was anything but play. in the end, you know, he