How to Stop a Broken Glass Door

When you cast the second you cast that spell from your position underneath the desk, you hear the sound of breaking glass and the dome above you had shattered. And at this point, um, I'm going to pop it off, Brogden, uh, reaches down under her desk and you hear a click and her desk starts to change. There is, uh, what looks like a small turret, uh, hanging from the ceiling. As she, as she hits this button,  a metal gate that is like the width of the room starts to drop down from the ceilings. It is going to cover up basically the her half of the room,. Uh, and sort of separate all