Help with "Mush AID"

[Pewskeepski]

I can't find the way into the room next to the sign that says "There must be a way in." Can someone give me a hint :)

(BtW, Kinda funny how the sign reads "There must be a way in" :p)

[uberDude]

If I recall correctly, you can shoot one of the hedge walls to make it open (not that I have any idea which one). Just shoot everywhere until something happens. The correct block may have a different texture on it.

[Pewskeepski]

Thanks, I got it now :D