I have two
1) I'm running the "White Ghost, Black Death" WWE (that saw the OV get their heads kicked in by Loren Jaffrey and his ragtag band. Jaffrey's side had already cleared half the board, the only real threat left is a Viking on the OV side. Slade and Mindar (forum handles) are in partial cover, pounding on the Viking, Slade with an Akuma, Mindar in a Rifleman. The Viking let's rip on the Akuma, ends up doing light damage everywhere but, importantly, it does 8 to the head. Last LRM fires, 8 missiles hit. First 5 LL, which hits the hill because partial cover. Mindar looks at Slade and says "You're fine unless he hits your head". Next roll, 3 points to head. Roll for crits, 12. Akuma falls over unhurt but headless. Mindar is no longer allowed to tell us what we "don't need to happen".
2) We are running a city fight, part of the fighting between Liao and Davion during the FedCom Civil War. My FedCom Axeman has two kills, one a decapitation with the axe and the other AC20 through the CT of a light mech. On the next street over a Liao Jinggau has stopped, perfectly lined up for be to jump behind. So over the building I go, landing three hexes behind the Jinggau. I fire everything, AC20 hits untouched leg, everything else spreads out, no internal damage. But I'm fine, he can, at most, hit me with one arm. Until he asks for clarification, "As long as I don't have hand or lower arm actuators I can arm flip, right". Me, "Right, why do you... Crap". Jinggau arm flips and proceeds too put a Gauss through the head of the Axeman, along with the rest of his weapons ripping the arm off.