Soap in a microwave turns into a monster

I figured out how to film inside a microwave without destroying the camera. First video is of ivory soap. The bubble of air inside expand to create this cool effect.

Here's a playlist of all the "filmed inside a microwave" videos:
https://www.youtube.com/playlist?list=PLcqX4UMXNKEerIHyokYEdNhFVUpz95wyU

Music: At Rest - Romance by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100748
Artist: http://incompetech.com/

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