"Potzdamer Platz" Underground / Old weight scale

I saw this old scale in the Bearlin underground but it did not work as i hopped on it. I was dragged on and was only able to snap a picture as we passed it.

Little Bear in Berlin, Germany

Visiting Berlin, but I was not allowed to come along as my peer was busy all the time. I hope I will visit Bearlin again! I surely will.