The "On the Open Road" scene for Goofy himself. Getting an entire highway of drivers to join in on what started out as a Serendipitous Symphony ditty between him and his unenthusiastic son has to count for something. Hell, if getting a dead guy in a hearse to sing and dance along isn't awesome, I don't know what is.
The Zany Scheme of the film's for Max — He manages to turn a father-son camping trip into appearing on live television with (an Expy of) Michael Jackson.
Max using The Perfect Cast to save Goofy from falling down the waterfall.
Goofy telling Pete that while Max isn't everything he thinks a son should be, he loves Goofy.
Max's stage show at the beginning was an in-universe one at least.
There's the scene where Goofy tries to quit the Gammas. Tank picks him up and asks Bradley if he should knock some sense into him. Apparently not in the mood to be polite, Goofy grabs a pool que and slams it into Tank's foot.
The referee doing everything in his power to ensure that Team 99 gets as fair a chance as possible to get another member. The delivery of the simple "Not by my watch!" telling off Bradley who was engaging in Hypocritical Humor made it even better.
Goof Troop fans, try not to smile victoriously when PJ is shown dancing freely and openly while actively flirting with the girl he just a minute ago was completely clamming up around. Seeing him smile so much more consistently can lead us to smile in more ways than one. And of course, other people can still find him funny. PJ.