Hoping that he's small enough; and that with the poor light and his failed dagger throw, he'll go unnoticed by the captain. Smells, tucks up close to the railing for the captain to pass. As the puff of powder hits the captains face, Smells tries to hobble the man by slashing at the back of his knee. But the captain is moving to quickly and smells misses his opportunity.
SpoilerHide: (1d20+12)[28]
Atk: (1d20+5)[6] (-2 if hide fails)
Dmg: (1d4+1)[4]
Sneak: (1d6)[5] (if hide succeeds or the captain happens to be flanked)
(and this time it's a 1)