Go to the hotel that you start at. Drain the pool then go to the vending machine next to the security guard near the two pools (one of which you have drained.) Go through that door and up to the roof. You can now Acid Drop into the pool by ollieing and pressing R2 just off the jump. If you want to practice for when you make your own skate team, go to where the half-bowl on the roof is located and jump off the kickers there. Press R2 immediately to do an Acid Drop. You should get Ludicrous Hotel Gap 1 of 4. Keep going straight and go off of the quarterpipe directly in front of you. When you get close to the top, press R2 and you will get Hotel Gap 2 of 4. Then, Spine Transfer down the other side of the bowl and get Hotel Gap 3 of 4 and Spine Transfer over the two quarterpipes that are back to back to get Hotel Gap 4 of 4.