Apollo 17 would break several crewed spaceflight records: 1) longest moon mission duration: 12 days 13 hours 52 minutes (just a day and a third shorter than the 14 days set in 1965 by Gemini 7), 2) longest total lunar surface extravehicular activities (22 hours 4 minutes), 3) largest lunar sample return (110.52 kilograms or 243.7 pounds), – longest time in lunar orbit (6 days 4 hours), and 4) most lunar orbits (75).
On re-entry Casper hit the atmosphere at an altitude of about 400,000 feet above the earth and at a velocity of nearly 25,000 miles per hour.
The LM eventually crashed due to lunar gravity anomalies. Since Houston didn’t know exactly where it landed, it was not useful to calibrate seismic experiments on the surface.
It was the only time in their whole lunar stay that Charlie had a real moment of panic and thought he had killed himself.