Responses

Eurydice fell if I remember correctly since Orpheus broke his contract with someone.
Orpheus tried to retrieve Eurydice from hell(?), and then they allowed him but as they climb back to the surface, Orpheus must never look back to Eurydice. Eurydice stopped walking at some point, so Orpheus was anxious Eurydice disappeared, so he looked back. Then Eurydice fell back to hell, leaving the poor Orpheus.
But wait... Orpheus had Euridike as his beloved...