I was part of the first round interviews.
1) There's an essay before the actual interview. They have you look at a picture and ask you to write about it and how it relates to physical therapy.
2) After, they bring you upstairs into a room where they have grouped you all by colors. Professors will call you individually where you then will be interviewed by 2 faculty members.
The professors were really nice but some of the questions they asked require you to be able to think on your feet a little bit. My best advice would be to answer honestly, but polish it up since you're speaking to professors.