Pronunciation
Glottal stop (stød)
You experience a glottal stop, for example, when saying something like uh-oh. You might also have heard it in some English dialects, where butter, for example, is pronounced buʔer ([ʔ] = glottal stop).
The stød is very common in Copenhagen. However, there are dialects (like in southern Sjælland and Lolland) that don't have a stød. It can appear in almost any word.