↓ Transcript
Panel 1:
A hand flushes a toilet
Panel 2:
A hand goes to open door
Panel 3:
Lisa (off panel): gasp!
Her hand recoils.
Panel 4:
Close on her eyes.
Lisa (to herself): I didn't lock it!
Panel 5:
Lisa is out of the bathroom. She's in a restaurant. She's dazed. To herself: I can never trust myself again.