A 19-year old was hospitalized after a fall from the cliffs at Richardson Park in Ridgefield yesterday afternoon.  Fire officials say the man was conscious when paramedics encountered him on the trail coming down from the cliffs.  Initial reports in the Ridgefield Press were that the man fell some 20 to 30 feet.  He was moving with help from his friends, and was in fair condition.  Witnesses said they were jumping in the water at the time of the incident.  It's unclear if the 19-year old hit rocks