You're now ready to prove yourself to Mindy's friends. Talk to Boone who's standing near the hotel by the Skate Ranch entrance. You'll have to do a 3-trick combo in order to impress him. Although it you start out facing the building with the ramp on it, it's a good idea to build up speed by getting some air off of the ramp on the hotel behind you then using that momentum to get more air off of the building that you have to trick on. Spine transfer just as you clear the roof and then hold grab and press up twice to do a nosegrab and a frontflip. You'll have to do this all very quickly and release the grab button before you land to pull this one off.