: You'll never take me alive! Ghost Cops
: You're a ghost.
In many, many languages, a large number of idioms refer to death and specific body parts. For living characters (presumably what you're dealing with most of the time) having them use these works fine. It works less fine, however, when undead characters try to use them, as some In-Universe Fridge Logic
can arise quite fast.
As a result, whenever you hear undead characters talking about "being scared half to death," "being chilled to the bone," working towards something "until the day they die," or similar, expect someone to lampshade it.