I'm sorry

Hope for the best buddy
I've seen Cerberus in my dreams one time, three headed dog right?
I seen a dog out of the corner of my eye, but I had to focus to see all three heads.
One of the heads chewed off one of the other heads (as a wolf gnawing at their own leg to escape from a bear trap) and the head grew back. After this happened, the beast noticed me so I turned around and ran as fast as I could and hopped onto a fence and climbed over and dropped to the other side and looked back but I wonder why he didn't jump after me over the fence.
I found this excerpt in my studies from
www.dictionary.comAlso, Kerberos. Classical Mythology. a dog, usually represented as having three heads, that guarded the entrance of the infernal regions.
2. a formidable and often surly keeper or guard.
A three-headed dog guarding the entrance to Hades.
watch-dog guardian of Hades," c.1386, Latinized form of Gk. Kerberos, of unknown origin, perhaps cognate with Skt. karbarah, sabalah "spotted, speckled." Sabalah was the name of one of the two dogs of Yama. (further research suggested)