I thought about it for assisted attacks. Let say that Gino and Bob make a group attack on Steve. Steve is defending.
Steve could do a hit on Bob: Steve hit Bob with his Dual Hammers in the chest for 265.
or
Steve could do a double hit with specific items (such as shotguns, temporaries or heavey artillery): Steve fired 5 rounds of his Jackhammer hitting Bob in the groin for 450 and Gino in the chest for 670.
Questions? Comments? Insults? :P