Vertigo, he said somewhat or very hard announcements.. I wouldn't call 'Top Gun, Road Rampage/Warrior, Wrecker, Pancake, Roadkill/Road Rage etc.' for even medium announcements. Still :P, I got to agree with Flawless (Public DM/LMS)
 Btw, I remember I've gotten "Untouchable" on a multiplayer match.. But, if what you say is true (which it most likely is), it's just my memory failing me.
My understanding was that he just meant the more obscure announcements, ie. the non-killing sprees or multikills. Pancake is a toughy though! Especially with a Goliath :P Feel free to clarify on Road Warrior though, I'm not completely sure what that is (I don't play or like Onslaught).
No offence to your memory, but I didn't see Untouchable in the announcer soundpacks.
No offence taken ;P But, I don't know what the Road Warrior is (I don't like/play onslaught either) I just saw it in your previous post.