Hey there,
I just got back into Reach a few weeks ago after taking a hiatus for about 6 months. First off, I want to thank Bungie for making the playlists that much more fun. Including Firefight Fiesta, which is hilarious.
Now, I was playing Firefight, and I must admit that I've never seen this, or I don't remember it happening before, but since *when* did Skirmishers learn how to use Holograms? (which, btw, are totally unconvincing since Bungie did TOO good a job of making their AI distinctive, which means their holograms stand out much more).