Miraculous Ladybug/Nightmare Fuel

Stormy Weather

 * The first akuma we see in the show slips through into the elevator where Aurore is. Unlike most episodes, where they don't notice or fight it, Aurore actually (understandably) seems scared of it and tries to fight it off. But it doesn't work and she becomes Stormy Weather.
 * The scene where Ladybug and Chat Noir are frantically dodging vehicles, particularly a bus.
 * The ever growing icicles that threaten Alya and Manon.
 * The beginning of Hawkmoth's gross treatment of underage people. He very affectionately calls Aurore/Stormy Weather my weather girl. Ew!

The Bubbler

 * Like most 'get rid of the adults' scenarios in media, many viewers were quick to notice and worry about what happened to any babies and young kids after their parents/guardians were abducted by Nino.
 * Where were the bubbles taking the parents/guardians/unhappy kids? Oh nowhere, just outer space!