When you jump, press the PRINT SCREEN key several times to get lots of points.

              When you are in stunt quarry mode select the T-rific Track and
              then go to the end of the map where there is a BIG hill that goes
              straight up. Go a fair distance back and race full speed towards
              the hill. You should be able to make it up the hill. Once you're
              up, keep going forward and eventually you will be blown REALLY
              HIGH up in the sky.
              Can´t get up the hill? Try the TAB button when you are halfway up!