คุณสามารถยืนได้นานแค่ไหน

We did a test! Horst was allowed to film us. Us - that's Maria, my best friend and me Meli. The first question was: does Horst get a stand? A joke: Has not even turned on the camera ... there it was already! Second question how long can he keep? ... not too long - you can see if the camera wobbles! And how long do you stop?