It looks like a Kiwi hanging there, but I have never seen flowers like this... nor them starting upside down with little legs.
The vine just crawled up my neighbor's fence and started flowering this year.
Not all passion fruit are good to eat I hear.
Our good ones are different, the fruit turns purple and wrinkles up (like it is dried out and bad) and then drops off the plant, that is when we gather them up. I scrub them good, cut them in half, scoop out the innards and put in one bowl and the shells in another. Soak the shells over night and then scrape them from the skin. The innards go through a sieve to get the seeds out and then
In to the pot with sugar and jelly happens! Yummy Jelly!
You can cut it back in Spring to keep it in check if it's getting too invasive. It survives hard pruning; be aware though it will also pop up of its own accord in other parts of the garden.