If you're watching the original 1986 series, this episode focuses on Goku and Krillin's first day of "real" training under Master Roshi .
While Goku is on Snake Way, the other Z-Fighters (Yamcha, Tien, Krillin, Chiaotzu) train in a virtual simulation at Kami's Lookout. DragonBall_Ep_017.mp4
They face two past Saiyan warriors in a "Spirit Room" simulation and realize they are nowhere near strong enough yet to face the upcoming threat of Nappa and Vegeta. Dragon Ball Super (DBS): "Pan is Born!" TV REVIEW: Dragon Ball DAIMA – Episode 17: Gomah If you're watching the original 1986 series, this