Luiza Silva/UC Davis UC Davis students Ben Moroski and Alice Vasquez appear in Noises Off, which opened this week in Main Theatre. Noises Off is a play within a play, showing what the audience sees (in this case, a British sex comedy titled Nothing On) and the hilarious goings-on behind the scenes. Remaining performances: 8 p.m. Nov. 16-17 and Nov. 29-Dec. 1, and 1 p.m. Nov. 30 and 2 p.m. Dec. 2. Tickets: (530) 754-2787 or (866) 754-2787, or www.mondaviarts.org.