Flips and tricks are not part of Parkour. For this reason, they are not covered under our insurance policy and they will not be taught in classes. Secondly, while many instructors are capable of acrobatics, few are qualified to teach them. If you wish to learn about L’art du Deplacement or Freerunning read this in the Parkourpedia.
Should you wish to learn these other arts your most effective way to achieve this goal is to learn Parkour initially, your grounding in Parkour will give you the right spirit and training techniques for your further training. From there you can go to a gym and learn flips in a safe environment from people who best know how to teach them. You can then combine the two out on the street.