Video of odd behaviour

[Alicia]

to me, looks like she's annoyed by something touching her, possibly the paper from being moved

I second this - that looks like a push to me. Like AbsoluteApril said, quite possibly the paper being up and weird like that. Then, if she's also smelling another snake (say, a male, and she's no longer receptive) that can increase how touchy she's feeling.

Never hurts to keep an eye out, though.