Liik OMG!This happpens alot.Just let it be!
I so def think that it can move out.Anemones are 95% water.An anemone 12 inches can shrink cown to about 2 inches with no doubt!IMO would just see how it does after a week or 2.Do a serch on here for some more threads like this I promis that you will see many more!
IMO looks like its going to heal very fast,However I will sya it may not eat for sometime but never know!But the anemone sbeing upside down is a sign of stress so I would still watch and keep and eye on it to see how it turns out.Do you think you could post pics daily so we could see how it imporves be the day?
Thanks
Dont worrie.I think it will live.