Janusz Gajos almost got killed one day on the set. He arrived early in the morning to shoot some scenes, and was told afterwards that now he had to wait at least four hours to shoot next scene. He decided to take some sleep, and, in costume - a camouflage-patterned battledress - he took a nap on the ground. When he woke up, he found himself underneath a parked truck - his camouflage worked so well that the truck driver didn't notice him lying asleep on the ground.
Throughout the whole series, Gustlik uses the specific local dialect, accent and pronunciation from the Upper Silesian Industrial Region; however, as he mentioned several times, he actually hails from the Cieszyn Silesia - an entirely different part of Silesia, with very different local dialect.
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