What are your weird moments of (nearly) perfect fluency?

What are your weird moments of (nearly) perfect fluency? Because I noticed recently that if I'm wearing headphones and listening to someone speak on loud volume (a podcast, a gaming streamer, a reviewer, just anything with a speaker), that I can speak to a person in front of me almost fluently! This doesn't work with music or just loud sounds. Only loud, speaking voices--loud enough that you can't hear your own voice that well. It's like it's tricking the linguistic part of my brain into thinking it's not me speaking... or something. What are your weird moments of fluency?