gluing small sheets of paper around campus with cryptic puns offering social commentary on campus happenings. The society originated in the late 1940s and has waxed and waned in activeness over the years. Its postings, known as "burgers", typically contain three lines, with the center one being most prominent. They are glued to surfaces around campus using a figure eight shape. Orientation Adventure As part of Pomona's 10-day orientation, incoming students spend four days off campus completing an "Orientation Adventure" or "OA" trip. Options in recent years have ranged from backpacking in Sequoia National Forest to sea kayaking in Channel Islands National Park. Begun in 1995, the OA program is one of the oldest outdoor orientation programs in the nation. Pranks Pomona students have committed a number of pranks over the years that have entered into college lore. Notable pranks include: In 1911, two students snuck into the dean's office and buried the large safe there beneath the floorboards; it was not discovered until several weeks later. In 1968, students stole the Christmas tree from Frary Dining Hall and moved it to the top of Smith Clock Tower. Chemistry professor R. Nelson Smith (class of 1938, taught 1945–1982) fostered an active prank culture in his department, which included office modifications such as replacing a desk chair with a toilet, turning all furniture upside down, and replacing all furniture with a gerbil and its food cage. In 1975, students replaced the frieze honoring Frédéric Chopin on Bridges Auditorium with one honoring Frank Zappa in advance of a concert he performed there. In 1978, students suspended a sailboat from the ceiling of Frary Dining Hall. In the 1990s, students covered up the door to the mathematics faculty offices to make it look seamlessly like a wall. Pomona students have also observed or participated in many notable pranks at nearby Harvey Mudd College. Harvey Mudd is well known for its active prank culture, including stunts such as the 1986 heist of Caltech's cannon. Some Pomona pranks have targeted neighboring Claremont McKenna College, the college's main athletic and ideological rival. Ski-Beach Day Pomona College takes advantage of its location near the San Gabriel Mountains and within driving distance of the Pacific Ocean to host an annual "Ski-Beach Day" each spring. The tradition dates back to November 1891, when the college established an annual picnic in the mountains. The outings began to focus on winter