The men of Lambda Chi Alpha painted the Rock today to advertise for their “Teeter-totter-a-thon.” From the Facebook event page:

“The 24 hour teeter-totter-a-thon is Lambda Chi’s fall philanthropy benefiting Better Existence with HIV (BEHIV). The teeter totter will be located outside of Deering Library from 8 AM til 5PM. It will then be moved to outside Lisa’s Cafe from 5PM til 8AM the next morning. Participants pay $5 ($20 for a team of four) to ride the teeter totter.”

BEHIV is a AIDS service organization in the Chicago area, more information can be found on their Web site.