When he saw Jesus

"When the man who had the demon saw Jesus"

he cried out

"he screamed" or "he shrieked"

"lay down on the ground before Jesus." He did not fall accidentally. (See: rc://en/ta/man/jit/translate-symaction)

"he said loudly" or "he shouted out"

This idiom means "Why are you bothering me?" (See: rc://en/ta/man/jit/figs-idiom)