Denebor Milasch would likely react to being in the penalty with confusion. Like what has happened to lead to him being put in the box? It must have been fairly serious or there was a massive rule change recently. Generally when Denebor makes a mistake and it leads to a penalty he get to send one of his teammates to the box to serve the penalty for him. So likely Denebor would not know to react and would just sit there kind of stunned as to what happened. He would like be more worried about what happens when the penalty ends. Is it a dead sprint back to the crease because if so he needs to start practicing speed skating in his gear. Or does the game wait till a play stoppage occurs to let goalies get back to the crease? Really this whole situation raises more questions than Denebor could really answer. So likely Denebor does not know how he would react to being put in the box.