Athelstan wants to pass
Understanding quickly that his only means of passage is through these two bony fellows, Athelstan quickly unfurls his flail and charges the one nearest him.
Athelstan rolls 3d6, getting [1,2,1] = (4) to hit
Athelstan rolls 2d6+4, getting [3,1,4] = (8) to hit location (chest cavity/trunk/what-have-you)
Athelstan rolls 3d6, getting [4,5,5] = (14) to damage
Got a feeling that removing the skull won't stop the rest of the body from fighting... hit the trunk instead.
'Scuce me, sirrah, you're blockin' progress.