Bemoaning the pitiful existence and demise of a man he knew nothing of, Regulus had not yet noticed that the stranger had begun to wake. It wasn't until he had been spoken to did he notice that the man was sitting up, and, well, not as dead as he had initially thought him to be. A new sort of panic struck him and he scrambled backwards as quickly as his kicking and shoving could get him.
Though he had hoped that the man hadn't really been dead, it had been so long since he discovered the body that he had resigned himself already to the idea and had begun his process of coping. And, now, with the strange suddenly awake and cohesive, he found himself infuriated and mortified by the situation. So, naturally, Regulus reacted in such a manner that only he knew how. With anger.
"You! You were dead!" He shouted, pointing an accusatory finger at the other; his face still flushed from holding back tears and suffering through heart-wrenching dismay. "You were there, this morning, and--under things and--I tried...for the blanket--but you were dead!"
Throwing his hands up and into his hair, he stared in a state of disbelief at the other as he tried to wrap his mind around the matter. "I know it--I know you were dead." He could not forget the feeling of that cold, cold skin brushing against his fingertips and how unmoving the man had been. So lifeless; and he had stayed that way all day. It was at this point, in his desperate search for answers, he had finally noticed the wand and Regulus felt his whole body breathe a sigh of relief. For the most part.
At least, in that wand, he would find some way of explaining what had happened.
"Wizard." He whispered under his breath, slowly dropping his hands back down. As his shoulders slumped, Regulus scowled at the man, rubbed his brow with the heel of his palm and seethed: "You were dead...like."