Because Ryder asked CJ to show him how they drove on the East Coast.
In all seriousness, it's a joke of its own and Ryder's car gets blown up cause it skips a cutscene.
Wait no my last comment doesn't make much sense. I think it would be funnier if I he rearranged the carefully procured contents of his pockets to skip to the credits.
@SylverReZ,
For my birthday I will go to the movies and then we will go to a restaurant where they serve pizzas and other things like ice cream for example.