This paper analyzes the occurrence of phonetic interruption cues at points of syntactic irregularities (false starts and truncations) in a large annotated corpus of German dialogues and compares interruption glottalization with laryngealization in terminal low phrase-final prosodies. Glottalization (including glottal stop) predominantly marks word fragments, whereas non-verbal insertions, e.g. breathing, tend to be word-external interruption cues. Laryngealization (excluding glottal stop) predominantly signals terminal phrase boundaries in turn-final positions. Individual speakers differ a great deal as to the distribution of these phenomena.