In the minute selected above you will see 13 spikes, roughly every three seconds. These are the blinks or rapid eye movements. The smaller blue spikes in between them are the heartbeat, but it is not very clear in this recording. The orange line (fREM) is when the program played the audio track.
The final REM cycle started with abnormally long / powerful blinks, which luckily slipped past the algorithm. And I had the longest dream on record; 15 minutes of non-stop rapid eye moving action. The anthem triggered at a perfect part in the dream, raining music from the heavens and a few minutes of solid lucidity at the end.