So I'm playing in another 4E campaign as a minotaur barbarian, and I'm going up against a solo-rank orc high guard. He and three other enemies are surrounding me, though the enemies were weakened thanks to my allies. I use my strongest technique on the orc and crit. The DM formed up some special crit/fumble charts to make such circumstances more interesting, and my roll on the chart allowed me to make two extra attacks, in addition to the attack granted by a barbarian feature I had. Those attacks helped my drop the other three enemies surrounding me, leaving only the orc, dazed and bruised. I didn't finish the orc with this, but it was great nonetheless. Also, I know the title of this thread is sort of a misnomer, but one critical hit was the trigger to this onslaught, so I'm leaving it as is.