counted 600 inmates, were completely down on the ground. >> okay, get up. >> so officer mitchell, what just happened just now? >> basically, what we had, two guys, they wanted to horseplay, get a little bit heavy. if we allowed things like that to continue, what's going to happen is they're going to start fighting, the possibility of other people getting involved. >> though the alarm call at corcoran ended peacefully, our cameras encountered a different situation at northern california's pelican bay state prison. >> one, two, three. >> just having a routine guard release. >> our producer was conducting an interview with lieutenant ben grundy while a second camera was shooting routine footage on the yard below. then suddenly -- >> there is an alarm in that building right there, a-3.