When the man saw Jesus, he cried out and fell down before Him, shouting in a loud voice, “What do You want with me, Jesus, Son of the Most High God? I beg You not to torture me!”
Christ ordered His disciples to sea that He might display His glory upon the water and work kindness for a possessed man on the far shore. They that have Christ accompanying them may safely venture anywhere; but even at His word, in a calm, they must prepare for storm and utmost peril. The devil, prince of the power of the air, perhaps suspected Christ's purpose to cast out that legion and poured tempest upon the ship to prevent it.
AI summary
Commenting on Luke 8:22-39
For he had commanded the unclean spirit..... That had the rest of the devils under his authority, and power, to come out of the man; this he had done, either before, or just as he came up to him; See Gill on Mar 5:8.
Jesus, thou Son of God most high - The words Jesus and God are both omitted here by several MSS. I think it is very likely that the demons mentioned neither. They were constrained in a summary way to acknowledge his power; but it is probable they did not pronounce names which were of such dreadful import to themselves.