Hiya!
[MENTION=15700]Sacrosanct[/MENTION], if you want to potentially roll a lot of d4's...go pick up Hackmaster 4th Edition (the "first" Hackmaster). There is a mechanic called "Penetration Damage" (hehe...penetration...hehe...). Ahem...yeah, well, you get to roll the d4 again, at -1, and keep rolling as long as you keep getting 4's. So if you roll, 4, 4, 4, 4, 2, you would have a total of 4 + 3 + 3 + 3 + 1 = 14. This works with other dice too (for damage). If you roll 2d6, and get 2 6's, you can roll them both again, with -1 to each. Keep rolling 6's. The thing is, though, that some 'big' weapons (like a giant sized battle axe, for example) has damage that is like "4d4". Your chance of getting at least 1 4 is almost guaranteed. My wife's half-ogre fighter killed herself that way (*extremely* flukey rolling!; fumble, very rare fumble result, critical on damage to self, then 4 fours, followed by some more 4's, then a few more of them).
Hackmaster 4th has had some of the most memorable gaming I've had in decades, to be honest. We pretty much play it as "AD&D 1.5e", ignoring or otherwise changing some of the silliness....but only some. Use humor when it needs to be used to lighten the mood from all the horrible, horrible death and dismemberment.
PS: For those of you who, like me,
love d12's... check out Dominion Rules RPG. It uses only a d12 for it's mechanics.
http://dominionrules.org/
^_^
Paul L. Ming