That is pretty great with the bikes. Your characters can probably win the triathlon event now.
I think it's hilarious driving around - I will get these moments where I thread through traffic, trees, and buildings, like I'm Lando fucking Calrissian flying the Millenium Falcon through the Death Star, but then I'll come around a blind corner, bounce off a tree wrong, and plow into traffic/buildings/pedestrians like that Porkins guy in A New Hope who plunges into the Death Star. My favorite is when you hit things hard enough that wheels fly off the cars.