The funny lookin midget was armed with real bullets that did real damage to real bodies, which wasn't really funny or scary, it was just plain dangerous.
Somebody who no matter how hard they try and keep a straight face while looking in the mirror, are secretly laughing at the funny lookin guy/girl looking back at him/her from the inside of the mirror.
Funny lookin guy/girl looking in the mirror- Today, you're gonna keep a straight face for five minutes. Don't underestimate yourself, what is that a smirk forming in the corners of your mouth? You want to keep your teeth? Yea, keep a straight face on your face. If anybody messes with you, say what you just said, just like you just said it.