The lunar rover, nicknamed the moon buggy, was used on the final three Apollo missions. Jim Irwin of Apollo 15 remembers rover drives as an adventure, despite a top speed of 8 miles per hour. "We were always running the car at full throttle, trying to make the most of our time on the moon," he said. "And what was out ahead of us was a little uncertain. Many times we'd come up over a hill and there'd be a crater, and Dave [Scott] would have to throw the controls hard in one direction, and we'd go up on two wheels." Every time we hit a rock or a bump, we'd just fly into space. So I estimate we were floating through space a good bit of the time."