This.
I would also add when Dany closed her eyes right before Drogon arrived. "By the power of love and friendship - I summon you, Drogon!"
... and the completely amateurish Unsullied, running around in no formation whatsoever. What the hell is the point of being armed and trained like a legionary/hoplite if you just end up jogging around with your spear once the fighting starts. And why do they insist on using spears in close combat? I think I remember it specifically being said in the books that they also have short swords for close combat, which makes so much more sense.
... and Ramsey and his "20 good men". The term "Good men" must be the Westeros equivalent of "Super duper elite Mossad Ninja-agent". I suppose they all god away completely unharmed. Ramsay is apparently one of the most resourceful people in Westeros :
1) Invincible fighter (when fighting the ironborn)
2) Expert geographer (you know, he knows the area around Winterfell like his own backyard, even though he is from the Dreadfort, which is miles and miles away),
3) Able to sneak wherever he wants
4)The best torturer there is,
5) Deep understanding of human psychology and behaviour, the way he's able to control people and read their minds, and predict their behavior.
... and how did the son of the harpy Jorah threw his spear at manage to sneak up to around 1 meter away from the goodamn queen? Why were the Unsullied standing around in small groups of 2-3 all over the arena instead of protecting the queen WHEN THEY ARE IN THE MIDDLE OF A GODDAMN CIVIL WAR/REBELLION AND THEY HAVE A MASSIVE CROWD OF UNKNOWN PEOPLE AROUND THEM?
Argh.