He slipped when he was climbing down from the excavator. He did not fall however, the impact from missing a step was jolting. *Note..this report was originally filed on 7/10/07, because he was complaining of pain but had not made an appt with a Dr till 7/17/07. He was having knee therapy & we instructed him to see a specialist. We sent him home 8-10-07, MRI 8-13-07;surgery 9-13-07