RM2 (3 book box set/red border? Just want to make sure I am referring to the correct series here) has a Brawling Attack table and an Armored Fist attack Table. We would just resolve the crits on an appropriate table. Chair, club, table leg, bottle... Krush crit. Broken bottle, fork, nail.... puncture, slash, or tiny crit. Really strong Elven Ale to the face.... very weak minor acid attack, unless the target was a Dwarf. Then it got ugly.
The Brawling attack table does show pictures of a broken bottle and a couple of other objects and the damage is considerably lower than that of a trained attack and it is much harder to land a high crit, however, it just resolves on one of the existing crit tables. It would be interesting to see a crit table dedicated to Brawling attacks. It would have to be extremely "generic" in it's descriptions though.
"39-43 A-Brawling Crit : Strike foe with (insert item) to foe's face. Foe is cut or bruised depending on item. If foe is cut, foe bleeds at +1/rnd. If foe is bruised, foe is stunned 1 rnd. If item was fragile, item is shattered and useless, if item was not fragile you get +5 to next attack with same item."
If you do make a Brawling Crit table... any chance of translating it into RM2 for us Old Folk too Set in Our Ways to Let Go of the Past?