Why is the Apollo 13 mission describe as a cliff-hanger?

The Apollo 13 mission is described as a cliff-hanger due to the dramatic and life-threatening challenges faced by the astronauts following an oxygen tank explosion en route to the Moon. With limited power, dwindling life support, and a critical need to navigate back to Earth, the mission turned into a race against time. The intense uncertainty and ingenuity required to solve problems, coupled with the real possibility of disaster, kept both the crew and mission control on edge, resembling the suspense of a thriller. Ultimately, their successful return against all odds heightened the story's tension and emotional impact.