- Country: Germany
- Genres: Short, Thriller
- Release:
- Director: Bernd Heiber
- Writers: Bernd Heiber
- Language: German
- Stars: Paul Faßnacht , Irm Hermann , Isabella Parkinson , Benno Rutnowski
- Runtime: 26 min
- Awards: N/A
- AKA: Das Klopfen , Das Klopfen (Germany)
- Plot: N/A
- IMDB:tt0383450