Mark 3:11 shows the same pattern: unclean spirits fall down and declare Jesus as Son of God — a recurring motif in Mark.

Luke 4:41 has demons crying that Jesus is the Son of God. Here the demoniac falls before him, showing the same recognition of his authority.

James 2:19 says demons believe and shudder — this demon's worship is that fearful acknowledgment, not saving faith.

Luke 8:28 is the parallel account of this same event — the demon cries out and falls before Jesus.