Scenario:
Sixteen-year-old Dane Pi was a cadet in his high school's ROTC program. As part of the program, he went to Ellsworth Air Force Base for a summer camp. To enter the base, he was required to sign a waiver that exempted the school from any and all liability for any injuries arising from his visit. While participating in the activities, on the base's confidence-building course, Pi fell from the top of the 10-foot climbing wall and suffered serious injuries. He filed a suit to recover his medical costs. The school asserted that he had signed their waiver of liability and therefore was prohibited from recovering any damages. Could Pi disaffirm the liability waiver? Explain your answer applying the law you learned and include any case law reference.