[MLD-Grounds-Keeper-Willie]

Gollum attacked from behind not because he was a coward, but because he was weaker. It wasn't cowardly but smart and cunning. He was a very sneaky creature. Despite all that torment in his mind from the ring he could still be crafty and cunning like a fox (although he looks more like a weasel). Or maybe it was the ring's influence on him. Anyways, if he had attacked straighton, then it would be useless, and he even might suffer injuries. He was smart, not cowardly, there's a difference between the two.