FIL just got home from a two week vacation with his eldest son. We got reports that FIL had no trouble walking, going up and down stairs, and didn't use his rollator. BIL rented a wheelchair for longer strolls. FIL had his own room but, other than that, he was always around the family. At home, FIL normally is depressed, anxious, unsteady, wobbly, prone to furniture surfing, and using a wide stance because he won't use his rollator inside his indy living apartment. He does use it when he goes out. Two weeks seems like a very long time to keep up an act especially if FIL truly has something physically wrong with him although nothing shows up on MRIs or CT scans.