"No one can open the Vault alone. I opened the Vault. There was no one with me but I was not alone." In my own alternate timeline Kabr manages to escape the vault XD. I found out how to return to the beginning of the Vault of Glass from the gorgon's Labyrinth to the entrance, after getting out you can go down again with the Sparrow. if you do go down , as soon as you reach the Gorgons checkpoint ,the game gets confused and spawns a Detain barrier outta nowhere,which normally only appears at bosses. i discovered how to climb it up back in the days when the vault was popular,i searched every corner in the hopes of finding a new secret ,but i couldn't record because i only had a PS3 .