A temporary employee climbed onto a 28-inch high table to clean the top of the head assembly of the profile saw used to cut polyurethane foam. While cleaning, he tripped over the pneumatic hose and struck the blade. He then fell over to the other side of the head assembly onto the table. The employee sustained an amputated right foot and a laceration on his left leg. The machine was not locked out/tagged out and guarding was not used at the time.