What about this armored cabinet?

Hint: What is a method I can use to open it?

Hint: How can I apply some pressure here to keep it open?

Subject: How can I rig something to increase the pressure?

Hint: How do I add the weight to this contraption?

Hint: How will the letter 'enlighten'?

Hint: What will the microscope 'reveal'?

Hint: How can I make the buttons 'react'?