Post-kiss, Tris is feeling pretty good about herself. And you know what that means: this chapter is probably going to be a downer. No one in books can be happy for long. It's written down in the literature laws.
Right on cue, in the cafeteria, Four/Tobias comes in and ignores Tris. This leads to a totally believable moment of doubt—"Maybe he changed his mind about liking me. Maybe he thinks kissing me was a mistake" (11). Girl, we've been there.
To top it all off, Four takes the initiates to run through a fear landscape. Luckily, they're going to use the fears of one of their instructors, a woman named Lauren.
Lauren explains that most people have 10-15 fears, with the record for lowest fears being… four.
Since it's Lauren's fears, it should be easy for Tris to get out of it, right? Unfortunately, Lauren has a fear of being kidnapped that reminds Tris of the night that Peter, Drew, and Al dangled her over the chasm.
So Tris freaks out, natch. And Four yells at her to pull herself together. Tris slaps him (which is fun in a book, but really, not a good way to treat someone you like).