The Nazgul: do you feel they made them look weak?

well,<P>sure, they looked cool....sounded cool....but it almost seems like aragorn and arwen could have just taken frodo at their leisure (if he wasn't dying from the blade)..and not had to worry. In other words, they looked and sounded scary..but I didn't see much of a need to "run" from them.<P>You have no idea what their powers are, what they are capable of etc...don't get me wrong, I loved the movie....but the cave troll appeared much more 'dangerous' than those nazgul....they didn't seem like great kings wielding the power of the rings..that is my point.