He chuckles and, in his tone, is the slightest hint of trepidition. It's strange, seeing him like this. The 'mask' doesn't come off, even though they both know who he 'really is.' Then again, Tim probably knows better than anyone not to assume which is the mask and which is the man.
Clark steps forward and very hesitantly grabs the knob. He turns it and swings the door wide in one quick gesture, "huh huh. See? Nothing there." He's trembling...actually trembling.
"He...Hello? Uh...anyone there?" He leans his head in the door.