Fiancés on the Bridge (1962)

A subtitle warns, "beware of dark sunglasses." Anna and her lover, whose looks in bowler and bow tie are reminiscent of a young Buster Keaton, kiss chastely on a bridge overlooking the Seine. He dons sunglasses and waves as she runs down a stairway to the river's edge, then watches in horror as she's knocked flat and loaded into the back of a hearse. In vain, he gives chase. Disconsolate, he buys a large funeral wreath and a handkerchief from sympathetic vendors. He removes the glasses to wipe his eyes and realizes they are the cause of all his woe. He replays the farewell without the glasses.