Goku doing his best Tails impersonation to survive elimination here was pretty great. Although, I suppose it'd be more appropriate to say Tails does his best Goku impersonation in the Sonic games, I suppose I can add this to the list of many things that Sonic seemingly borrowed from Dragon Ball. Not that I'm complaining, DBZ and Sonic were the two biggest things in my childhood, so it's interesting to see just how many connections they have.
That tangent aside, the Kamehameha duel was nice too, gives you sense of how strong Goku will end up being, and continues to make this battle have the highest stakes as Goku's constantly surpassing Roshi's expectations.