Banging on trashcans is just the tip of the iceberg.
Whistles, hitting pipes, and yes BUZZERS!
Here is an AB of Robinson Chirinos who had some big BOMBS during the 2019 World Series vs the Washington Nationals. @JOMBOY tweets the real-time footage and the slowmo version. You can see something fly off Chirinos. Something that is super sticky, something that he doesn't want to leave on the field, something he doesn't want anyone to know about.
The video of Chirinos needs to be further investigated and explained. All of this evidence could lead to opening up the Astros investigation once again. The players would lose immunity and probably their 2017 WS or anything they've won since.
Here are some whistles for those who think the 2017 World Series games were all legit...