  I give three descriptions of the Mukai flop of type $E\_{6,I}$, one in terms
of Jordan algebras, one in terms of projective geometry over the octonions, and
one in terms of O-blow-ups. Each description shows that it is very similar to
certain flops of type $A$. The Mukai flop of type $E\_{6,II}$ is also
described.
