Pinkie Pie knew how absurd her world sounded, but it was really all she knew before showing up at Marrowood and learning that people in this town came from all walks of life. Who knew that there were other worlds out there? Before she showed up here, she only knew of Equestria. Since being here, she's learned of many other worlds out there - places where time travel was the only mode of transportation, she's met royalty (lots and lots of royalty). She's seen witches, wizards and seers. Where these things were only in her imagination back in Ponyville, they were very real here.
Blue eyes studied Peeta as he explained what sort of world he came from. At the mention of a fight to the death, her jaw dropped, "Fight to the death?!" Hands went up to mouth to try and cover up her shock, "Why on Earth were you fighting to the death?!" Frowning with deep concern, Pinkie jumped up on the counter, next to the dough Peeta was making and sat down. She could feel this was going to turn into a serious conversation, and she wanted to show him that he had her complete attention.
"How did you two make it out?! I mean, that's just... crazy! Why did you have to fight at all?"