Yes, it makes remarkable sense to me also that a bat-a-rang could KO Ultimus, but Tank Shells can't penetrate his Force Field. Thor hit him with his hammer when he wasn't looking, and all it did was to get his attention. However, it's well known fact that Cap's Shield can destroy Planetoids, and those deadly bat a rangs could be even far worse. It all depends on what side of the bed the writer woke up that morning- and what particular substance he happened to smoke..