If it relates the image you posted above ... it is not the Hetzer. More pics of the "Warsaw" vehicle .... Muzeum Powstania Warszawskiego - Muzeum Powstania Warszawskiego
the pic source: File:Warsaw Uprising by Lokajski - 3313.jpg - Wikimedia Commons
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photo of the Warsaw Uprising showing a barricade being erected on Szpitalna Street at the exit of Boduena Street. Photo taken from the north. A disabled German armored gun of the type Jagdpanzer 38(t) (SdKfz 138/2) "Hetzer" of the 743rd Tank Destroyer Battalion is visible between the wooden spools of the cable factory in Ożarów and the garbage bins. In the background on the right you will see the main post office at Napoleonplein 8.
Author of the description: Piotr Głogowski
Obiekty - Niemieckie działo pancerne na barykadzie
Fotografia z powstania warszawskiego przedstawiajÄca barykadÄ wzniesionÄ w poprzek ulicy Szpitalnej przy wylocie ulicy Boduena. UjÄcie w kierunku ...kolekcje.muzeumwarszawy.pl
Do you mean a Puppeteer and a Tree?What train? All I see is a guy and a tree!