The Rave

S1 E15: Zack wants to organize a rave to raise money so the gang can go to Cancun, especially so Kelly will get over her break-up with Lasky. The original location of the rave is burned down so they move it on campus, at the Kreinberg Hall. They are caught by the Dean, but Professor Lasky covers for them. Meanwhile, Screech tries to fit in with the cool group by getting them nitrous oxide from his chemistry lab. Instead, he accidentally steals Helium.