It is possible for an opponent with sufficient physical or mystical strength of their own to turn the Juggernaut's unstoppable movement against him, by redirecting his motion so that he gets stranded in a position in which he has no escape; both the Hulk and his son, Skaar, have done this physically, and Thor has done it mystically with Mjolnir. The only character to have stopped Juggernaut while he was in motion as an act of pure physical strength was the Hulk while he was War, a horseman of Apocalypse and empowered with Celestial technology.