Harry and Snape face each other. Their eyes are joined by a beam of Legilimency. The beam opens into a narrative frame that shows one of Snape's memories. A note says "This page's dialogue is mostly from Harry Potter and the Order of the Phoenix, p. 646"
In the memory, a younger Snape, as a Hogwarts student, is lying on the grass near the lake, surrounded by three people who are taunting and laughing at zem: James Potter, Sirius Black, and Peter Pettigrew. James Potter has light skin and light brown hair, and green eyes, like Harry's. Ze has a relatively smooth appearance. Ze's pointing a wand at Snape, and sitting in a chair. The speech of James and Sirius, who are both in Gryffindor, is similar to the Slytherin students' speech we've seen, but less curvy, more upright.
JAMES: How'd the exam go, Snivelly?
SIRIUS: I was watching him, his nose was touching the parchment. There'll be great grease marks–
SNAPE: ..... ... { Snape actually says "....." and "..." as normal dialogue. }
JAMES: Wash out your mouth! Scourgify! { "Scourgify" is the incantation of a spell that cleans something with soap. }
Pink soap bubbles come out of Snape's mouth.
Lily Evans is standing nearby, leaning against a tree, arms crossed. Lily looks a lot like Harry; zir hair is a bit messy, and ze has a generally rough sort of appearance. Ze also has the darkest skin of any character we've seen so far, and dark eyes, unlike Harry's. Ze's wearing a baseball cap. Zir voice, like present Harry's, is drawn in red and is fairly rough, but is a less intense shade of red, and somewhat smoother, than Harry's.
LILY: Aw, leave him alone, Potter.