Early SpaceX engineer crawled inside an imploding rocket on a jet
businessinsider.com
businessinsider.com
You've obviously never seen what happens to a pressure vessel when the pressure gradient goes the wrong way...
Here's an idea of what can happen: https://www.youtube.com/watch?v=Zz95_VvTxZM
Imagine being on a plane when a very large object inside of it does that. It could have caused the airplane to implode as well, or have catastrophic damage.