Well, quarantine is officially over for my boa
so I stacked the two cages and life is good.

Today I took the boa out of his cage, which is underneath the BP cage.
I stood up and looked into the BP cage to find him with his head extended out of his hide, looking at me with interest.

I slowly raised the boa into view outside the BP's cage....

*POOF*! My BP retracted his head faster than I have ever seen him move in my life! He literally went into a full ball for the first time ever!

I guess the sight of the other snake scared the pants off of him, poor thing.

Needless to say, I won't be putting them together for any handling or photos or any other reasons - nor had I planned to.
However, it looks like I should be careful with lines of sight as well when I have one or the other out.

Anyone have their BP react strongly to the sight of another snake?