Nightbird (1973)

A small red glider flies against the background of city buildings. And his owner, the boy Domas, constantly sleeps during the lessons, and he never feels guilty. The class teacher even called his parents to the school. Domas seemed healthy to a yoga-obsessed psychiatrist. Sleep is a conscious choice of a boy. Modest in life, but bold in dreams, ready to shoot duels or destroy an enemy squad with a modern grenade.