Stackshot Apple Tv 4 I was watching some Netflix on my Apple TV 4th generation, when I by mistake sat on my remote, suddenly a message appeared in the upper right corner, the message was like “Hold the button to activate stackshot in X seconds”, I can’t remember the specific text but it was something like the above mentioned.

So what is Stackshot? What is it used for,? And how do I activate it again?

Apple TV 4th gen. tvOS 11
According to the Apple Developer documentation stack shot is to used collect all kind of information about a crashed process. 

Apparently you used a button combination that activates Stackshots. On iOS it’s works like this (assuming tvOS works almost the same);


  Stackshots
  
  For freezes or hangs with your iOS device, or when stackshots are requested, please follow the instructions below to capture and attach them.
  
  Press the Home button and either volume button on the device at the same time
  
  Note: Press the button combo several times to capture a series of stackshots


https://download.developer.apple.com/iOS/iOS_Logs/Stackshot_Logging_Instructions_iOS.pdf