Herz Fessen, by Monika Hoinkis, is a bowl filled with water. By taking hold of its handles, the rhythm of your heart is carried over and the water starts vibrating.

Skin-resistance is measured hence your heartbeat is calculated and assigned to the waters pulsation. The water will “beat” for a while in your heartbeat rhythm, then the pulsation slows down and stops, unless someone else grabs the handles and communicates his/her own heartbeat to it.

Video.
Documentation of product process (in german).