The filing cabinet is behind the teacher's desk in the Detention Room. You need gum and a stink bomb.
Collect all 8 comic pieces. The comics shop guy will give you the frame for them. Assemble the comics and he will give you some gum. Use the combination on the comic to open Nate's locker for the "hidden room blueprint". In the Science Lab, use the chemistry set to create a stink bomb (mixing and heating the yellow and blue chemicals).
Chew the gum in the hall and get detention. Use the stink bomb there to run the teacher off. The secret room is behind the filing cabinet, as shown on the blueprint in Nate's locker.
(Note : if you don't have the blueprint, you cannot access the filing cabinet. Go outside and get it, then simply re-enter the detention room - stink bomb is still there).
You need the gum, the stink bomb, and the blueprint for the secret room.
Collecting the comic strip pieces will provide the gum, and Nate's locker combination is on the assembled comic. Open the locker and get the Blueprint. Mix a stink bomb in the Science Room by adding blue and yellow and heating them. Now you can chew the gum, and get into detention. Use the stink bomb to run the teacher off, and enter the opening behind the filing cabinet (the light is by your feet).
You leave him in the hideout
In the file cabinet, in detention, in the school.
a guy who was trapped there!
I am guessing you are talking about Big Nate Island when you are in Detention. Well, it is VERY simlple. You click on the second drawer on the file cabinet. Very simple.
It is used in detention, so as to be allowed near the file cabinet.
Set off the stink bomb and enter the file cabinet.
You have to use your stink bomb you made in the science room.Then the women will leave the room.Go to the cabinet click on the bottom of the cabinet and it will open.
Artur is in the secret room behind the file cabinet. (He was hunting for the Time Capsule.)
in the detention room.
in the cabinet on big Nate island
you can not. you have to go in it.
You don't. Anywhere you would need a ladder, you can usually jump up to in some way.