So, we already know how terrifying it is to run into anything bigger than yourself in Dwarf Fortress. Bronze Colossi, Trolls, Elephants... they can all already hit you hard enough to send you flying, often with horrible results. Now stop and picture this for a moment: what if they could drag you around? Or, perhaps more entertainingly... what if a sufficiently strong dwarf could drag someone else around? It might be kinda cool to be able to grab ahold of an enemy, drag them over to a cliff, and chuck 'em down it... or possibly help in stealthy scenarios, where you could grab an outlying bandit, drag them away from their comrades, and kill them off without raising the alarm.
Or what if you're stronger still, and can pick up and carry an enemy? Granted, tackling a kobold from behind, picking him up, and running off with him might not be terribly practical a lot of the time, but it'd sure be funny. Or better still, suppose this included some sort of instant intimidation against anything that feels fear? (You KNOW you're gonna have a bad time when your opponent can toss you over his shoulder like a bag of wheat without any visible effort.)
Obviously, a lot of dwarves are strong enough to carry people... they can haul corpses around without any trouble, and people don't suddenly weigh less when they're dead. Basically, what I'm asking for would be the potential to drag and/or carry around characters, provided you can get past whatever resistance they'd put up.