It's fine, me am dealing with a lot of classwork as well and I know you are collaborating with others as well so I don't mind waiting a while.
For the chaotic racing scene, I was thinking of something like with Mario kart or blur with our characters or with characters we like, also the scene could show them using items in a turn or a straight road?
Its all good! I also tend not to reply late sometimes.
Also, good question cuz, I'm unsure where to start. Maybe some crazy racing scene as a brief suggestion? unless if you have a better one, me would like to hear it! :0)!