Easy to do. Have the health of a machine drop and catch fire. Most machines will catch fire after the 9th usage. The staff will stare at the fire and panic. Keep the machine on fire and the health will slowly drop. After that it will explode.
As long as someone is in the room when it explodes you will unlock the achievement. If no one is in there keep dragging a member of staff in the room.
What i did to keep someone in there when it exploded was to have a janitor water the plants i had in the room.