Here is a fun video showing a toilet flushing from the inside.
http://science.discovery.com/videos/deconstructed-toilet-flushing.html
http://dsc.discovery.com/videos/mythbusters-nastier-than-a-toilet.html
http://science.discovery.com/videos/deconstructed-toilet-flushing.html
http://dsc.discovery.com/videos/mythbusters-nastier-than-a-toilet.html
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