Astonished at His Majesty

Luke uses a curious choice of words at the end of the section in which Christ casts a demon out of an epileptic boy (Luke 9.43). Luke says that Jesus rebuked the unclean spirit and healed the boy, and gave him back to his father. Then he follows with his comment about the reaction of the crowd. All were astonished at the majesty of God. Matthew and Mark who record this same incident do not include this comment. I'm wondering why the crowd was astonished at the majesty of God when the boy was healed? It seems like a more natural comment would be to say that the crowd was astonished at the power of God to heal, or maybe the crowd was astonished that God did heal. Why majesty?

Luke must be trying to tell us something here. BDAG defines μεγαλειότης as quality or state of experiencing high esteem because of awesome performance, impressiveness. Louw-Nida further defines it as: : a manifestation of great power—‘mighty power, mighty act.’ which Luke seems to want to communicate that those who witnessed Christ's actions and words understood that they were not witnessing the ordinary here. They were witnessing the extraordinary. Christ could not be a man with a penchant to heal. He was something beyond that, and his commanding an evil spirit out of the boy demonstrated the fact.