Reb Michel Yehuda Lefkowitz and the Train Ride

In his youth in Europe, Reb Michel Yehuda Lefkowitz once was traveling by train, in order to protect his eyes from an inappropriate not Tznius sight, that he felt would compromise his Kedusha, the young holy bachur jumped out of the window of a moving train and severely injured his ribs, all in order to preserve his purity. Only after his mother saw him in great pain was he compelled to tell her what happened. Years later in Eretz Yisroel she told the story to some of Reb Michel Yehuda's children, which is how we know this story.