Sure , there were times when he was alone in a dark place and he would get a bit fearful himself , but he concluded it to be irrational fear . But this , this was different . This feeling he could n't shake off and every little noise caused him to look into it more then he should . He felt a weight in his heart and he did n't know what to make of it .
According to the above context, answer the following question.
What may be the reason for feeling a weight in his heart ?


There 's an intruder in the house .