I just got the hard badge and I figured I'd share some tips in case they help anyone else. 1. Don't go for the rails unless there's no jumps coming up even then it's not always worth it. 2. Make sure you are collecting the notes, while getting your combo up is good it does nothing if you don't collect score while you get it. 3. When going into a jump hold down so you do a back flip, then try to make your next stunt a front flip, keep holding up after you jump, if you have to move instead do the appropriate spin, if you get the two flips done first it is easier to get to a 10x score as you can just move and spin or roll in that direction.
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