I think I recall that very scene from The Outer Limits.
Giant Bugs with cartoon faces. It scared the FK out of me as a child. Even at the age of seven, I didn’t want to discuss it, and look foolish. So now, at the age of 63, I discuss it, w/o worry of looking foolish online.
For me it was the earwigs episode on The Twilight Zone. If the Chinese have brain eating earwigs, I'm definitely going to need more toilet paper.
Not only were the bugs scary looking, but they made a horrifying sound which terrified me.
For some perverse reason, this has always been my favorite ‘Outer Limits’ episode:
http://en.wikipedia.org/wiki/ZZZZZ