Why did Hephaestus get thrown off Mt Olympus?

Hephaestus was thrown off Mount Olympus by his mother, Hera, as a punishment for being born deformed and weak. In some versions of the myth, she was ashamed of his appearance and deemed him unworthy of divine status. After his fall, Hephaestus landed on the island of Lemnos, where he was raised by the Sintians and later became the god of blacksmiths and artisans.