Rock Throwing racial trait

[Karkas]

Im playing in a new campaign with Race Building allowance of 15RP and I built a Cyclops with Rock Throwing. My concept is to play a wrestler type and so have opted to use the Brawler advanced class.

My question is this.. Can I use Rock Throwing to throw a small creature. It states object with hardness 5, but what if its a goblin in metal armor, if said creature is grappled, wouldn't the armor count as a "rock"? It's not like they can doff their armor as an immediate reaction or free action.

Thematically, it would be great to chuck creatures 120ft. into the air and watch them fall to their deaths.

[Umbranus]

RAW that doesn't work. And using such an ability to throw a creature in the air and watch it fall to their death is surely not RAI.
A person would be an improvised thrown weapon and for those the rules are:

Weapons wrote:

An improvised thrown weapon has a range increment of 10 feet.

[shadowkras]

Sure, if you also want your GM's giants to start throwing your PCs.

[Rory]

After you get your base grappler built...

Start adding barbarian levels. Take the Hurler archetype for:

Skilled Thrower (Ex): The hurler is skilled at throwing objects in combat. Increase the range increment of any thrown weapon or object by 10 feet. This ability replaces fast movement.

And then get these rage powers:

Hurling, Lesser (Ex): As a full-round action while raging, the barbarian can lift and hurl an object up to one size category smaller than herself with both hands or two size categories smaller with one hand as an improvised weapon with a range increment of 10 feet. This inflicts damage as a falling object (Core Rulebook 443) plus the barbarian's Strength bonus. This damage is halved if the object is not made of stone, metal, or similar material. This is a ranged touch attack, and the target may attempt a Reflex save (DC 10 + 1/2 the barbarian's level + the barbarian's Strength modifier) for half damage. The barbarian may apply Power Attack to this attack as a one- or two-handed weapon, as appropriate.

Hurling (Ex): As lesser hurling, but the barbarian can increase the range increment to 20 feet or increase the size of a hurled object by one size category. A barbarian must have the lesser hurling rage power to select this rage power. A barbarian must be at least 8th level to select this rage power.

Hurling, Greater (Ex): As hurling, but the barbarian can increase the range increment to 30 feet or increase the size of a hurled object by two size categories. A barbarian must have the hurling rage power to select this rage power. A barbarian must be at least 12th level to select this rage power.

And then aim to craft, create, find, steal, beg, borrow...

Belt of Mighty Hurling, Lesser
Aura moderate transmutation; CL 8th
Slot belt; Price 14,000 gp; Weight 1 lb.

DESCRIPTION
This thick leather belt is buckled with a bright bronze clasp in the shape of a fist.

When worn, it grants its wearer a +2 enhancement bonus to Strength and allows him to apply his Strength modifier as a bonus on attack rolls instead of his Dexterity modifier when making ranged attacks with thrown weapons. Also, the range increment of any weapon thrown by the wearer gains a +10-foot bonus. Treat this Strength bonus as a temporary ability bonus for the first 24 hours the belt is worn.

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Summary: You may arguably be able to toss a (pinned) foe ~250 ft or so.