1. Mcgonagall getting 5 times stunned to the chest and surviving.

2. Lupin and Harry fighting at grimmauld place in DH.

3. Sirius singing 'god bless ye merry hippogriffs'.

4. Peeves

5. S.P.E.W

6. House elves fighting in the battle of Hogwarts.

7. Potterwatch

8. De-gnoming

9. Harry talking to Sirius and Lupin about his parents.

10. All instances where wizards are completely clueless about muggles.