Today at work I was in an unusually playful mood (this usually comes with sleep deprivation for me), at one point one of my students pointed to my pupil gauge and asked me what it was, I whipped it out of my pocket, pointed it at him, click it on and made a wuwuwuwuwuwuwu sound, click it off, replaced it in my pocket and said, "Oh, it's nothing". He grinned really big and said, "AH! Like Doctor...Uh...*snaps fingers* Erm... Doctor, um... Whatever his name is!"
Close enough, kid.