Buffy #56 "Slayer Interrupted" Art Cover (Vol. 1)
Buffy returned from her runaway road-trip with Pike...only to discover that Dawn has read her diary, and shared what she found with their parents, who see no other choice: after she's burned down the school gym, run off to Vegas, and apparently lost her mind . . . they have her committed. Buffy #56 begins the first of a four-issue arc, "Slayer Interupted" by Scott Lobdell, Fabian Nicieza and Cliff Richards, in which we finally see what happened to Buffy in that mental institution.