batman:aa help please.

Im stuck, help me out please. Im in the misson where you have to get into the intensive care building where there a sniper on top. So how do i get in there?

climb the tower opposite the snipers perch and use your line launcher to get there.MethodManFTW

And use a batarang to knock the sniper down before you zip across so he can't shoot you!

duh i never thought of line launcher cuz it seems kinda far. thx