Fluttershy smiled and saw where Rarity was going. She didn't want to bother Rarity, but her stomach growled, so she went to the snacks to see what they had laid out.
Fluttershy saw she was being ignored, and took this chance to try and hide from the new pony. Ever since the changeling incident, she's been even more nervous around new ponies than normal. (Now you have a reason for Fluttershy being like this. XD)
Fluttershy heard what Dash had said, and noticed that if she dropped her, she'd tumble down the stairs and most likely break something. "Eep!" Fluttershy squeaked, covering her eyes.
"N-No! P-Please let me go, Rainbow! I-I'm not good with new ponies!" Fluttershy said, struggling to get free. She tried pounding on Dash's back, but she wasn't very strong, so it didn't work out very well.
Fluttershy tried to slowly scooch her way out of the room without being noticed to avoid having to talk to the new pony, still hiding under the covers the entire time.