BCI random death?

[Bogertophis]

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My BCI Boa does this same thing every now and then (Glass terrarium) , don't know why, but don't believe it's stargazing. Maybe she is just looking out? She is 2+ years old as far as I know,maybe older, sheds like she's supposed to and is very gentle when she is out for handling. she also uses her hides, and is stable when she is roaming around.

To be clear, most ALL snakes will ride up the glass now & then, & that is not "stargazing". What I meant though is that IN THIS CASE there is a lack of symptoms, so I'm trying to read into what little there was for some better indication of what may have gone wrong, especially since we do not all describe things the same way...and none of us (other than the OP) actually saw the snake.