I would do nothing at that very moment, imagine how far that thing could leap once attacked... I would make sure all the openings underneath and above the door(s) are sealed off for that room firstly. Then I would get at least three of those six pack foggers meant for taking out insects, open up one of the doors, set off a minimum of eighteen foggers one by one to make sure the job is done, throw them inside the room, and close the door... ....But not before yelling, "Tactical nuke incoming!" ;D