Every Greek scholar knows the celebrated lapsus linguae committed by the tragic actor Hegelochus at the Great Dionysia of 408 B.C., when he faltered in his enunciation of line 279 of Euripides' Orestes and gave the impression to the mirthful audience of having said I am surprised, however, that the commentators on this line have only partially explained the reason for its having seemed exceptonally funny.