I was going to someone's grief party, and I had the cape mod, when I saw that Nick_Godoy had this cape below; and he had no idea he even had it. But how did he get it? But this is my cape:
No idea although this is pretty similar to the Optifine cape (visible from an Optifine Minecraft client).
Optifine, only has the Optifine cape for donaters (Jack seems to love it...) and its the CapeMod or another version of a cape mod
How can you put it on without the capemod? It's not a 10 x 16 cape. Mine is. I looked around, and only he has it.
http://empireminecraft.com/threads/minecraft-skin-help.18372/#post-327543 From that post, I think he downloaded it after he asked you.