Dragon Ball - episode 53 - 03 Mar, 1987

Goku and Blue start fighting and Goku is winning until Blue powers up. Meanwhile, the whole ceiling is collapsing. He is just about to kill Goku when a mouse scares him. Goku gets up and beats Blue. Bulma and Krillin want to get out before the ceiling falls, but Goku wants to find the dragon ball. Once he gets it, he picks the mouse that saved him and runs, but Bulma and Krillin are about to leave. (Source: Wikipedia)