An interesting product. The video is a bit old. December 2012 and stars Top Shot Bass Pro Shooter Chris Cheng.

Challenge Targets made a cardboard target holder with a small twist. They have hinges at the base and a steel plate that is attached to the stand and sits behind the paper target. If you shoot a silhouette target anywhere other than center mass, the target remains standing. If you shoot the target in the center, you will hit the steel target which causes the target stand to fall down. Pretty useful if you want a little more reaction in your training.