Neck Lump, Whats wrong with my BP

[Skiploder]

If you knew what it was you should have let the OP know instead of offering what you did.

My thought was a rib could have been out of place.

A rib can pop out of place and is a fairly common sports injury. When it pops out many times it can be seen and felt as a bulge in the back. I don't know that it could happen in a snake but I don't see why not. It hurts when it happens.

If I thought the snake was in any danger I would have. The OP kept his/her head and it resolved itself.

Now what part of the anatomy corresponds to where the issue was?