In 1972, Jack Schmitt and Gene Cernan were so carried away by the role of the last people on the moon in history that they forgot to «wipe their feet» before entering their lander. Which, in general, is quite surprising, because they already knew how terrible this moon dust is.
During the mission, she had already managed to forget all the joints of their spacesuits. So much so that they couldn’t move normally. At the same time, the dust was so sharp that it rubbed three layers of Kevlar-like fabric on their shoes!
Because of such inattention, this very moon dust got inside their ship, and they had to fly with it all the way home. Constantly making sure she doesn’t kill them.