Gov. Chris Christie revealed the lowest point in his life during a Las Vegas conference, recalling a moment with his mother after she learned she had three large brain tumors.

“I kind of thought my mother was indestructible,” Christie said, pointing out that she had already beaten a brain aneurism and breast cancer.

Christie said that his lowest point was when he drove his mother home from the doctor’s office and she explained to him that she knew she was going to die.

The Philadelphia Inquirer’s Matt Katz clips video of the moment – taken from a conference video of a Q&A session with Christie.