When Kalle (Ralf Richter) picks up the materials at the hardware store, you can see two young guys kicking against their car in the background. It is a part of the scene from Peter Thorwarths previous movie Bang Boom Bang - Ein todsicheres Ding (1999) where Keek (Oliver Korittke) and Andy (Markus Knüfken) discover the dead body of Schlucke (Martin Semmelrogge) in the trunk.