1. What was the primary legal issue in Barker v. Lull Engineering Co.?
2. In Barker v. Lull Engineering Co., what burden does the law impose on the manufacturer once the plaintiff shows that the design caused injury?
3. What was the outcome of the jury instructions in this case?
4. How did the California Supreme Court view the consumer expectations test in this case?
5. What key fact contributed to the plaintiff's injuries in Barker v. Lull Engineering Co.?