Moving this from a different forum section.

I have a idea for if you miss a barrel roll.

You get half of the resulting boast if you had successfully performed 2 or three of them.

So, if the boast increase from doing a second barrel roll is 30/40%, and you start to perform a second and you fail, you get 50% subtracted from if you had done two.

Same thing for failing to perform the third barrel roll. You get 50% subtracted from if you had performed 3 barrel rolls.

I haven't played Wipeout in some time. So I apologize for my absence.