"Falling" is a hard film to watch because its central situation is so hard to endure.
Viggo Mortensen is John, a middle-aged corporate jet pilot who lives in California with a loving husband Eric (Terry Chen) and an adopted daughter, Mónica (Gabby Velis). Lance Henriksen is Willis, John's father, who still lives on a farm in upstate New York where John and his sister grew up, alone save for his horses, his dementia, and his rage.
From its first scene, "Falling" tells us what we're in for, and it's not an afternoon at Disney World. A sleeping Willis bolts awake during an airplane ride with John, who's taking him to California in a half-baked plan to buy him a house there, and begins stalking the aisle, shouting profanity and bellowing for his wife, who died years ago. He grabs the remains of a drink from another passenger's tray and downs it; that the passenger is Black makes you brace for a torrent of epithets that never comes, thankfully, although subsequent scenes confirm that you weren't wrong to suspect Willis of being capable of that. John trails the old man, trying to calm him down. You can tell by the reactions of passengers and crew that some of them have no idea what's happening and others know all too well. Finally Willis shuts himself in the men's room and almost manages to smoke a cigarette, something that hasn't been allowed on flights in decades.