All things are coming!

A student asked Guruji, "When will I be able to do a backbend?" Another asked, "when will I be able to do a headstand?" The questions continued, as Guruji sat patiently and smiled. Finally when the group had asked all of their questions, he grinned and said, "Don't worry. Many, many lifetimes. All things are coming."

:)

So remember: if frustration arises in your practice, breathe through it. You have lots of time to master these skills!