I'm halfway through my beef sandwich just now when I see some reddish stuff on it. I look closer and it's gone. I get about a third of the way through when I see it again. So I pull out a slice... And my damn beef sandwich is shimmering! It's like the effect on a credit card hologram, or a CD. All the beef is infused with a coppery sheen that is invisible unless it's held at a sharp angle, and only in one direction. My boss just looked too and it's plainly visible to him as well, it's not just my eyes. WTF did I just eat??