it depends from person to person... kid needs to assert to get things attracted while Sugar just touches people and they become dolls.. and roam where every they what... and plus the DF user must be in a state of shock and kid wasn't.. so its highly Likely he leg go of the scrap and the box while he was falling down... kid doesn't seem like a man of focus but that is what his ability requires when attracting scarp.. if he looses it.. he loose the grip on then too
now law could be wrong and kid intentionally released zeus because he thinks it's not a threat any more, being weakened just looks like a poor excuse to me