Allegra

• Get a rock-solid inside leg hang first.
• Warm up your back and shoulders thoroughly.
• Warm up your front splits well - you will need to use active flexibility on the legs.
• Keep the free leg actively pointing and reaching to create the long line the Allegra is known for.
• Learn it over a crash mat and come in and out of the release slowly until it's familiar. Ideally, always try first with a spotter.

Moves it helps to have first:

Moves that flow nicely with this one: