[@Mole]

The dull thumps of her beating mingled with her desperate pleas in the close space of the coffin, but if anyone heard her, she couldn't tell.

She could not detect any seams or indentions in the surface of the coffin. It was a smooth, pristine white, too tough to dent or move. But then -

In the midst of her flailing, she found something above her head. It was a handle of sorts, or a lever - she wasn't sure.

What did she do next?