Are there any electrical devices in the room like lamps, etc that are mobile?
If so do any of them have power?

If I am able to do it right I can jury rig the circuits to create a EMP (it worked in Toy Soldiers with a power line...just need a big enough one). All hypothetical, but still maybe could shock the door with the electrical stuff.

Magnets would be affected if it is a magnetic lock. If it fails, I'll keep looking.