What does the term 'snap' refer to in theatrical cues?

The term 'snap' in theatrical cues specifically refers to a cue that executes instantly, without any fade time. This means that when the cue is triggered, the change happens immediately, such as shifting lighting or sound effects, providing a sharp and clear transition. This characteristic is particularly useful in live performances where precise timing can enhance the dramatic effect or punctuate a moment. The other options do not align with the definition of 'snap'; for instance, cues that involve multiple fades or delays imply a gradual transition or wait, which contradicts the concept of an immediate cue.