in sunshine keys' challenge sheet, it says blow up 25 cars. in the only crash that place has, the counter at the top goes way over, even to 50/64 or whatever the number of cars there is, yet it does not say challenge target acheived. how do i get that challenge completed? it is my last one and i have not been able to complete it yet.

The counter only tracks the number of cars hit or involved in crashes. To actually blow up cars, you need to build up your Crashbreaker gauge by causing crashes. When it's 100% use it. Any cars close enough to your resulting explosions count towards this goal.

i'm having trouble with that one too it seems like theres not nearly enough cars in the level to blow up 25, even with the clasic crasher and a 100% crashbreaker