PSA: Know your rocks, Adventurers! Not all rocks are simply mineral matter of variable composition, consolidated or unconsolidated, assembled in masses or considerable quantities in nature, as by the action of heat or water.

Consider the following:
Is the rock hot and glowing and accompanied by the sound of explosions? It may be a Lava Elemental.
Does the rock have horns and an evil glare? It may be a Dark Monolith.
Does the rock have a large beardy face and smell of Dwarves? It may be a Dwarven Gate.
Is the Rock missing a ‘k’? It may simply be a large armored bird.
Is the rock cold to the touch and growling at you? That sounds like an Ice Golem.
Is the rock completely impassable and accompanied by more sound of explosions? That sounds like the Daemon Lord, Gorgotha.
Is the Rock a bit ethereal? A Rock Spirit maybe.
Is the Rock carrying an uprooted tree? That sounds like a Stone Giant.
Or is it carrying a guitar? That’s a rock musician.

Finally, if the Rock has a large blue gem in it, watch out – it’s probably an Ancient Golem!