do u mean @ the very beginning? if u do, u have 2 go 2 the top of the building (there's a ladder near it....just battle through some orcs) & go 2 the top & then aragorn should ask 4 help, & leggy should slide down this rope thing 2 go help him. slide down that, & then set of the catapults 2 destroy the orcs & this big wagon-thingy they have. OK, i hope that was the section u were talking about.
If not, answer back on here & if i 4get 2 check this post again, pm me, k?