Before Chris & Jacky had their Boston Public Garden session, PhD student Shiro, another undergraduate classmate of mine, had a brief headshot session in a gorgeous stairwell in the Harvard politics building. The left is my favorite of the set. It wasn't posed -- Shiro had just stood perfectly still and smiley for too many photos in a row, and the second he relaxed, I snapped that last one candidly.
The photo on the right was taken purely because I can never resist a bit of light leak. It's so dramatic!