bridge, on the perimeter pec wave. >> she asked him to do a perimeter pec wave where she asked him to basically go all the way around the pool and wave his pectoral flipper. and she blows her whistle, which is a bridge, which tells the animal you've done a good job, come back and get food. but he missed that cue. and he went all the way around the pool on this perimeter pec wave. >> we're going to let him keep on waving. >> my interpretation is that he didn't hear the whistle. >> so not only did he not hear the bridge, then he went and did a perfect behavior and came back, and what he got was what we call a three second neutral response, which is a way to let the animal know, no, you didn't do the correct thing. you're not going to get rewarded. and then we're going to move on. then you can also see through the video that dawn is running out of food. >> the animals can sense when you're getting to the bottom of your bucket of fish because they can hear the ice clanging around and the kind of fishy, soupy water at the bottom.