It's almost impossible to listen to the theme to X-Men: the Animated Series without "singing" along to it. At Comic-Con, the cast of X-Men: Apocalypse was asked, “Do any of you know the X-Men animated theme song?”

It's a little surprising that some of the cast didn't know what they were talking about. Then again, the theme doesn't exactly have actual lyrics.

Now you can go on the rest of your day "singing" the theme. You're welcome.