Season 2: Episode 20: Driver's Education
Girl's are into older guys. At least that is what Zack thinks, and Slater's birthday makes Zack a little nervous. So, of course, Zack master minds a plan that makes Slater fail his driver's test. Zack plans back fire when Slater ends up crashing the car and a locker falls on Kelly, but when she realizes Zack planned it, she fakes a worse injury.