Rei jumped slightly as she felt the brunette 's hand upon her shoulder , she had been in such deep through that she had n't notice the simple gesture by her friend . Mentally , she replayed the conversation back and nodded at Makoto 's words before offering a apologetic smile toward the two cats . She had n't meant to take her own frustrations out on them ... they could only tell them what they knew and as the thunder senshi pointed out ... they did n't know either .

Give answer the following question using evidence from the above passage: Why did she react the way she did to what touched her shoulder ?
It surprised her .