User blog:EmpyreanSmoke/How did Cas survive the fall?

After Metatron took Castiel's grace, all the angels fell, including Castiel. This is proven by Sam asking "So where did Cas crash land?", and Castiel saying "Do you have any idea how hard it was when I fell to Earth? I didn't just lose my powers, I had nothing." Since Cas didn't have any grace when he fell, he was mortal, so how did he survive the fall?