Peter Kranz in the bomb shelter is a scene in the extended edition of Downfall that is rarely used in parodies.
Wilhelm and Dorothee Kranz are seen in a ruined building along with many other civilians. Peter Kranz arrives, bringing food for both of them. He wants to go search for more stuff, but Wilhelm holds him back. A SA man comes and tells Wilhelm to let Peter go. Wilhelm refuses. The SA man tells Wilhelm that he should be proud to have a son in the Hitler Youth like Peter to which Wilhelm disagrees with. The SA man viewing that as an insult sees Wilhelm's missing arm and tells him he should be hanged. Then another soldier appears, telling the man to go search with him for water if he is tough as he claims to be. The civilians laugh at the SA man as they both leave. Peter then goes with them, leaving Wilhelm and Dorothee behind as she screams his name for him to return.