Towards the end of the movie....the lady scientist cuts her hand and jumps in the water to get the shark to come after her. She reaches up and tries to pull herself out of the water as it gets close, but the bar breaks and she falls back in the water. the scene cuts to the shark then right back to her. If you look closely when it cuts to her....She gives the 'cut throat sign 2-3 times to the camera man, which indicates that she's trying to end the scene because she needs air.