I was watching Twas the night before mxymas the other day and noticed something in the background

when Clark is talking to Mr. Myxyzptlk when time is frozen after his dad collapses, there's an old man over Clark's right shoulder blinking. not good at all, he should have been fired

I just watched that episode the other day and had to put it back on and look.

But your right he does! That's really funny!

I have to check this out!