The Daily Princetonian:

“One of our other roommates pulled some practical joke on Sam, which I do not remember,” Grais said in an email. “The other guy drank scotch-on-the-rocks every night. Sam retaliated by putting salt in the water used to make ice cubes in the refrigerator in our room. The other guy went through a full bottle of terrible-tasting scotch before realizing that his ice cubes had been sabotaged.”