Suppose that I and Matt were right in our SVPCA talk this year, and the “ Supersaurus ” cervical BYU 9024 really is the C9 of a gigantic Barosaurus . As we noted in our abstract, its total length of 1370 mm is exactly twice that of the C9 in AMNH 6341, which suggests its neck was twice as long over all — not 8.5 m but 17 m. How horrifying is that?