Muscle memory for standard Sans bone patterns while dodging Chara's knife strikes.

Many players spend dozens of hours practicing on the Bad Time Trio Simulator or specific demo versions to learn the precise hitbox of every pixel.

The difficulty of a No Hit run stems from the "tripled" threat. Unlike the standard Sans fight where patterns are singular, the Trio often overlaps their attacks. This creates "trap" scenarios where moving to avoid a Gaster Blaster might put you directly into the path of a Storyshift Chara knife.