A man who needed help sought out Jesus. Jesus helped him. Wouldn't you think the reaction of the crowd would have been positive. Instead, they were afraid. So afraid, that they asked Jesus to leave.
But, the man who had been healed wanted to go with Jesus. Instead, Jesus told him to go home and tell people what had been done for him. He did.
Sometimes, people see what Jesus can do and get scared. Sometimes, they get grateful.
We the church as the body of Christ continue his healing ministry. An example in Memphis is the Church Health Center. Those of us who have seen the miracles that Jesus can do shouldn't react with fear; rather, we should rejoice that his work is still ongoing.