How can I get into Hobbins' cupboard?

Hint 1 of 5:

He's never going to let you look around in there.

Hint 2 of 5:

But what he doesn't know won't hurt him.

Hint 3 of 5:

Just make sure he doesn't catch you.

Hint 4 of 5:

Create a distraction for him.

Hint 5 of 5:

Whenever you stand on the elevator platform, he will have to come out to turn
off the alarm.