Sleeping legend at the study room

Time: 4AM
Place: our small study room, every second year master student in National Taiwan University has its own study room, which he is sharing with 3 to 6 other students.
Person: ZaiSun, sleeping Taiwanese Marek Rusnak, legend of economics, as undergraduate student of Biology, who would expect him to show up here?
Reason: HW for Real Analysis class (math department class, my biggest respects here)