Heh... if you think a '2' is ineffective, you've never run a Kraken. Those Ultra ACs jamming up adds up fast. (Trust me, I know... I don't want to talk about it.)
I think the one that comes to mind for me was a furious battle in a grinder between myself and another player over what would happen to an Arrow IV missile. This was a grinder game, and one of the house rules was that you started with two edge points- you could use them as normal, or you could use one to call in an Arrow homing missile to strike your target (with a high modifier to keep it from being TOO broken of an ability). I spawned in a Vanquisher, the one with the quad Ultra-5s. Not a great Mech, but 100 tons at least, so armored like a battleship (and half as fast). My opponent got behind me, called in an Arrow from his Mongoose, and the battle was on...
...because there's only one place a Vanq is vulnerable, and that's its ass.
So he calls in the missile, and it's a hit. I don't use one of my edge points because I don't care about a 20-point hit, so long as it hits a limb. Well, it doesn't- he hits the rear center torso. That's a problem, so I burn edge and make him re-roll the location. He hits a leg- then uses his remaining edge point to roll a third location and gets the center again! NO. Second edge point from me, knock it off! It goes to the left arm. Whew!.. wait, why are you all laughing?
Another player burned his last edge point (he was leaving early anyway). Now, that's kind of shady- using an edge point for someone elses' roll is questionable. But, hey, it's funny, so let's go with it. (By now this missile has been comically flying around in circles above my head). Location this time is... rear right torso.
Now, take a moment, if you would, and check what's in that location for crits. I'll wait.
...
...
...
...Yeah. Yeah, that's a problem. That, for those not able to check, is an XL engine and three tons of Ultra ammo. I need this to not go badly. I need to luck out big time. I need-
-to not be ME, because if you have any idea who the hell I am you know what comes next... ammo crit, touches off the other two bins, engine is destroyed, pilot is turned into raspberry jam in his seat, Mech is down for the count and NEVER FIRED A SHOT in the game.
I still hate both of those Mechs as a result, and break out in hives when someone fires an Arrow round at me.
yes there are and they are mostly remembered for one thing...they are not in your favor
http://geekandsundry.com/dice-shaming-a-fantastic-source-of-mirth-through-misery/
so my suggestion is perform the excorsism on your dice asap