Ina Koenig, a German kindergarten teacher, jumped down a 75-foot mine shaft when one of her 3-year-old students accidentally fell down it. The shaft was flooded with cold water and for more than 2 hours she kept the child’s head above water until help arrived. – WTF Fun Facts
Source: https://www.growingyourbaby.com/teacher-plunges-into-75ft-deep-shaft-to-save-3-year-olds-life/