Invisible line between you and me

Invisible line between you and me

In an unknown and unpredictable situation when audiences walk and closer an objects (sweet potato and a chicken doll) and it will touch infrared line make the infrared device automatically alarm. The alarm will let audiences suddenly surprised and don't understand what happen after that think about do they do something wrong in in their behavious. However, there is nothing happen?

Invisible line between you and me/2017 / 0'26