Burger King
Mysterious spots on meat?

I was eating my burger, got curious and looked at my patty and it had several disgusting looking spots, I tasted them, I'm not sure what it tasted like but it didn't tasted like fat or something like that! Could someone tell me what are those spots. I'm scared of eating those burgers because of these "meat/patty spots".

Company: Burger King
Country: USA

  <     >