Barret asks Cloud if he wants to go on a walk. They head toward Event Square, and the guy who usually says "you're our 100th couple!" says "oh, you're not a couple." And the entire stage scene is skipped. Then Barret asks Cloud if they can go somewhere to talk in private, and you head to Round Square for the fireworks scene. Barret then asks Cloud why he wanted to take him on the ride, and why he wouldn't take Aeris or Tifa, or even Yuffie. Then Barret mentions Marlene for some reason and gets really pissed off about Cloud taking interest in Marlene. Then he starts cursing out the fireworks and starts shooting his gun-arm to try to mute out the sound.
It's a really funny scene. I've got a save file for before I get Yuffie - if I'm really bored I might go through the entire process trying to go out with her, too. :P