At this point, both minotaurs are helpless ... but, much to the surprise of the party, and particularly to Maximillian, is the appearance of a full-on natural bull that comes charging out of the room beyond. It attempts to horn the druid, but misses with a 5. The druid jumps back to 0502, suffers 1 damage from incidental damage as the bull skids to a stop in 0603, and then watches the bull slide through the hay until it's lowered head bangs into the minotaur in hex 0404.
The end image is:
|The bull enters and attacks|
The hold person spell is broken. The party has full freedom of action.
|As the larger minotaur falls to its death|