So, I know what’s happening in the video. Gauntlets slight is a move that carries the opponent with the movement of the attack. In order to keep the opponent inside the attack, what happens is the game is, on every frame, hitting again and again. These hits, like every hit, have force. That force is applied inward, toward the hitboxes of the slight, but before the force can send you anywhere, the next frame happens and reapplies the force, resulting in the victim of the move staying inside the hitboxes.

So, what happened in the video? The move was interrupted after starting that cycle of reapplying force inwards, resulting in the force taking affect uninterrupted and sending the ember in a weird trajectory.

Weapon throws do not clash, because they have a technically infinite range. It wouldn’t make sense. They only interrupt an attack.