1. The camera person was in a wheel chair
2. The camera person could not swim
3. The camera person has no arms and was operating the camera telepathically
5. The camera person wanted the puppy to drown
6. The camera person was about to go get the puppy when an over protective helicopter momma dog barreled into the water just to claim 15 minutes of unwarrented fame
4. The puppy really wasn't drowning. It swam fine to the edge of the pool