The video on the left shows a motion sensor that was placed in the upstairs portion of the home that was activated. There was no one present in the upstairs area when the motion sensor was activated (4 screen view, watch upper left screen). You can watch two team members that were just entering the home on the main level living room area. Just as they were approaching the entrance to the room that would lead them upstairs, central command radioed to them that a motion sensor was being activated upstairs. At the same time the two investigators that you see (4 screen view, watch the lower left screen) heard a loud bang coming from the upstairs portion of the home where the motion sensor is and notified central command to send in an additional investigator. You can hear what is going on in the clips below titled "Footsteps, loud noise,..." and "watch your head, bang...". The video on the right shows the third investigator entering the home to help. You can see the upstairs motion sensor activate again (4 screen view, watch upper left screen) as well as the basement mini mag light turning on (4 screen view, watch upper right screen) and then off again by itself.  As we entered the upstairs area the motion sensor which had already been on brightened slightly as it reactivated the internal timer as we approached (this was us setting it off this time). There was no one in the basement at the time. You can see the light turn on and off by itself while you see the only investigators in the house sitting in the upstairs portion of the home.

Reveal of Evidence 3/25/14: Christine and Kyle had personal recorders running during the reveal of evidence.