St. Joseph, Missouri, was severely injured while working on a bakery machine (the "Pan-O-Mat") manufactured by AMF. Kerber alleges that the machine was negligently designed and manufactured and that such negligence was the proximate cause of his injury.


3
During the trial, Liberty Mutual Insurance Company, workmen's compensation carrier for Continental, having paid workmen's compensation benefits to Kerber, asked that it be allowed to intervene in the action. The motion was subsequently granted. At the close of plaintiff's evidence, the trial court granted AMF's motion for a directed verdict. Kerber alone now appeals from the subsequent overruling of his motion for a new trial. We affirm.


4
Kerber, a young man just under 19 years of age at the time of the accident, had been a Continental Baking Company employee for oneand a half months, had previously worked on the Pan-O-Mat four or five times, and, for his age, had considerable experience with machinery.


5
The Pan-O-Mat is used for the making of buns and rolls. Basically, rolls of dough are dropped down a floured chute into cups and then pans which move on a conveyor belt. Three employees operate the machine — an "operator", a "front-end man", and a "pan setter". Kerber, a pan setter, set the pans in place at the center of the machine, corrected "stick-ups" and "doubles", and floured the chute. A stick-up is a ball of dough stuck on the chute due to lack of flour and doubles are two balls of dough in one cup. Kerber testified that the easiest, fastest and best method to