YMMV / My Little Pony: Friendship Is Magic S1 E16 "Sonic Rainboom"
Broken Base: Rarity's characterization, depending on who you ask. Was she right to show off her magical wings to everypony in Cloudsdale and in the Best Young Flyer contest or was she way too selfish and upstaging Rainbow Dash in the process?
Fridge Brilliance: Of course the Wonderbolts failed miserably at saving Rarity. They're a show team!
"Funny Aneurysm" Moment: Pinkie trying to eat the liquid rainbow is funny. But, it becomes unintentionally creepy if you're even semi-familiar with the fanfics Rainbow Factory (which is about rainbows being made from brutally-slaughtered pegasus ponies who have failed their flying exam) and Cupcakes (a lovely fanfic about Pinkie essentially being a deranged cannibal).
Suspiciously Similar Song: The music Rarity choses for her routine is very similar to the waltz from Tchaikovsky's Swan Lake.