One of my favorite episodes:

I set 2 timers for the same thing somehow. I then tried to cancel one of them.

  >“Siri, cancel the second timer”
  “You have 2 timers running, would you like me to cancel one of them?”
  >“Yes”
  “Yes is an English rock band from the 70s…”
  >“Siri, please cancel the timer with 2 minutes and 10 seconds on it”
  “Would you like me to cancel the timer with 2 minutes and 8 seconds on it?”
  >“Yes”
  “Yes is an English rock band from the 70s…”

Eventually they both rang and she listened when I said stop.