Pearl seems to have a hard time physically containing emotions (or controlling them at all). She shakes when she’s angry or really happy, does that spontaneous twirly thing when she’s gushing about the strawberry field. Then there’s the end of “So Many Birthdays” where she can hardly function when distraught.
I love this about Pearl, actually! You can tell she’s trying to be suave, graceful, mature (possibly why she idolizes Garnet a little) but she just can’t contain her emotions to carry that through. You end up with this sort of pedantry which is a little at odds with how graceful her movements are and how peaceful her ideology is.
Also, these gifs are fantastic.