John Gill Commentary Luke 8:28

"And when he saw Jesus, he cried out, and fell down before him, and with a loud voice said, What have I to do with thee, Jesus, thou Son of the Most High God? I beseech thee, torment me not." — Luke 8:28 (ASV)

When he saw Jesus
Even afar off, at some considerable distance, he ran towards him, (Mark 5:6) .

He cried out, and fell down before him ;
that is, the man possessed with the devil did so, under his impulse, and through his agitation of him:

and with a loud voice said ;
which was the unclean spirit in the man: what have I to do with you, Jesus, you Son of God, most high? I
beseech you torment me not ;
i.e. before the time; (See Gill on Matthew 8:29).