The first can went down at 4:50 a.m. in the parking lot of a fulfillment center outside Reno, the second at nine, the third at one with a protein bar. She was twenty, second semester, four ten-hour shifts a week. The fourth she cracked at 7:40 p.m. in the campus library, because the anatomy midterm was Thursday and she had opened the slides twice.

Her watch put her resting heart rate at 138 while she sat still. She screenshotted it, sent it to her roommate with three laughing faces, and got one back. At 11:15 she read the same paragraph on cardiac conduction nine times and went home. She scored a 71. Her mother called Sunday to ask how school was; she said good, and fell asleep on the call.