[1.4.3 and 1.5.0 rc4]
Provided that the Crusader already has the Holy Strength ability and a monster "dropped" the Holy Strength golden orb...
Bug: the Powered-Up Meteor Staff, shooting a tornado at the Orb, is able to move it around, both horizontally and vertically. Many times it propels the Orb into the ceiling, making it impossible to reach.
(The same effect could exist with the Necromancer's "red orb with skull" from his Soul Stealing ability)