Article continues below advertisementTom Cruise keeps raising the bar with his own stunts - though he revealed some left him dangerously close to disaster.Article continues below advertisementIn a bonus feature for the digital release of Mission Impossible - The Final Reckoning, the 63-year-old action legend opened up about one jaw-dropping moment that almost pushed him past his limit.As a clip rolled of Cruise dangling off a biplane with nothing but a seatbelt strap to hold onto, he confessed, "Oh, this almost broke my back.