Isaac Goldberg described Gershwin’s enthusiasm when conducting:
He conducted not just with his baton, but with his cigar, his shoulders, his hips, his eyes and whatnot. Nothing but a sense of propriety keeps him from leaping over the footlights and getting right into the show himself.
Cited in: Greenberg, Rodney (2008) George Gershwin. New York: Phaidon Press, p.111.