Mike Tyson's Punch-Out!! was released almost 30 years ago for the Nintendo Entertainment System (NES), and since then gamers have been knocking out Piston Honda and Bald Bull with a single punch just before they do their signature moves. However, a new visual cue has been uncovered that tells NES fans when Little Mac should make a well-timed swing at the heavyweight boxers.

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The Easter egg for the classic Nintendo game was discovered by a Reddit forum member named midwesternhousewives. They noticed a bearded man in the first row of spectators behind the boxing ring's ropes.

When the bearded guy ducks Mac can get a KO by using a single jab or body blow at the exact right time when Piston Honda starts his Honda Rush attack, according to Hot Hardware.  

NES gamers can use the same technique when battling Bald Bull during the second round. The late former Nintendo CEO and president Satoru Iwata revealed another Easter egg that can be used in the first round. A camera flash is a cue that a body blow will send Bald Bull down for the count.

However, the bearded man shows up again in round two. When he ducks the bald man can be knocked out with a perfectly-timed one-hit punch.

 Another Reddit user verified that the Easter Egg for the game featuring Iron Mike exists. The bearded man does not move during the first fight with the opponents, but ducks during the second match with Little Mac.   

Fans of classic NES games can enjoy the old-school titles by using a new 3D emulator, according to Mashable. The emulator is in its beta version but it can help to add depth to the original 2D Nintendo games including Super Mario Bros. 3 and Mega Man.

The software is named 3DNES and actually creates a mix of two and three dimensional games. It only runs in the Firefox browser and tweaks game environments differently for various NES titles.

Vietnamese developer Trần Vũ Trú built the emulator tool after working on it for months.  Progress of the emulator is documented on the YouTube channel named Geod Studio.

Trú has not revealed how the 3D process works and has just provided a few technical explanations through YouTube comments.

Here's how to knock out Honda Piston with one punch: