Based on the context and the answer, generate a question. 

Context: It 's just a fucking dream . Yet as he thought it , he was not all that sure it was true . Whatever what happening in the recurring night - trip had to be unsettling or upsetting or something of the like to some degree , otherwise something so stupid would not be effecting him so strongly .

Answer:

A nightmare has brought up bad memories .



Why is this person so shaken ?