For Johnny's fifth birthday, his parents buy him a treehouse made by your client, TreesRUs. When Johnny is 14, he is injured when the main support beam of the treehouse gives way as Johnny, who now weighs 250 pounds jumps up and down in it. TreesRUs asks you what the state of strict liability law is in Indiana. Can Johnny or his parents file against Trees? What must they show to prevail? Does Trees have any defenses?