I haven't played the original Killzone, so I don't know if it's in the original. I got the PSP demo (when I picked up the Guitar Hero 2 demo), and thought; "What the heck, I'll give it a try." It's alright I guess, but this more or less caught my interest:
Sorry for the low quality of my Camera Phone. Still, you get the idea. In case you didn't notice, I actually turned it on the side to take the picture. It's not such a blatant rip-off that it stands up...instead, it's rotated 90 degrees and just barely split at the top.
Again, I don't know if this was in the original Killzone or not, so if this is old news, I do apologize.