Short Answer 
The man recognizes his wife’s unusual request to check the microwave time as a distress signal indicating she may be in danger. Analyzing the context reveals that her request is serious, leading him to quickly call 911, demonstrating the importance of timely responses in such situations.
Step 1: Recognizing the Distress Signal
The man understands that his wife’s unusual request is more than just a casual question. By asking him to check the microwave time, she is subtly signaling that something is wrong. This indicates she may be in a dangerous situation and needs help without arousing suspicion from a potential intruder.
Step 2: Analyzing the Context
The request to check the microwave time becomes significant when considering the environment. In a safe situation, it would be unnecessary to ask about the microwave’s timer because its display can be seen easily. Therefore, the man deduces that this request implies a pressing need for assistance, alerting him to call for help.
Step 3: Taking Immediate Action
Realizing the implication of his wife’s message, the man quickly acts by calling 911. His prompt response is critical as it showcases the importance of quickly recognizing signals of distress in dire scenarios. By promptly informing the authorities, he ensures that help can be dispatched to protect his wife from potential danger.