'Mike Tyson's Punch-Out' Easter egg discovered nearly 30 years later

It's one of the most iconic sports games ever. And even though the "Mike Tyson's Punch-Out" is nearly 30 years old, secrets are still being discovered.

A Reddit user released a video that revealed a visual cue that will reward players with an instant knockout of two of the memorable fighters -- Piston Honda and Bald Bull.

The Redditor illustrates the cue that the developers added into the NES game that no one had unearthed. The trick is when Honda and Bull go into their special attacks, a fan will duck in the crowd, allowing the player to know the perfect time to punch.

Now where did I leave my NES and that copy of "Punch-Out", again?