Easy how to fly guide; never use a car again.
Guide to Create Hoverboard
Find the racing gates, there are three around the track in the mansions backyard.
Make sure you cut off enough of the supports that the sign remains intact and theres still support beams on the back.
Stand on the support pylon, grab the sign and look in the direction you wish to go.
There are three gates around the complex, Try using this strat instead of cars and see how well you go!