Can’t make these Final Destination scenarios up.
If she was laying on the bed near the wall, and the bed suddenly deflated, and she was a very heavy person, I can see how she might have been swallowed up by the mattress, much like infants have been smothered while sleeping with its parents in a waterbed. Those beds have controls on both sides and the fully inflated side would have pushed her into the wall, especially if she WASN’T very big.