Neighbor from hell: Is he trying to break the sound barrier in the toilet?

Seriously need to vent because I think I’m losing my mind. Does anyone else have a neighbor who treats their HDB toilet like a recording studio for a horror movie?
I stay in a pretty standard BTO block, you know the drill—walls thin enough to hear your neighbor’s life choices. But this guy? This guy is on another level. Every single morning, around 7:15 AM, without fail, he descends upon his toilet. And when I say “descends,” I mean it sounds like he is literally giving birth to a bowling ball.
I’m talking about grunts, groans, and a level of guttural exertion that honestly makes me worry for his internal organs. It’s not just the noise; it’s the sheer conviction. The walls literally vibrate. Sometimes there’s a dramatic thud—is he falling off the bowl? Is he fainting? I’m half-tempted to call the SCDF for a wellness check, but I know for a fact he’s just going through his morning ritual.
The whole level can hear it. I’ve bumped into the auntie from next door while waiting for the lift, and she just gave me this “look” and whispered, “He’s at it again, ah?” We don’t even need to say his name. We know.
What is happening in there? Are we talking about a lifetime of accumulated mala xiang guo? Is he trying to pass a literal space rock? The acoustics in these bathrooms are already unforgiving—you can hear a pin drop in the unit above—but this guy has turned his WC into a stadium concert.
It’s reached a point where my breakfast appetite is completely ruined. I’m sitting there trying to enjoy my kopi and kaya toast, and meanwhile, he’s providing the soundtrack to a battle scene from Lord of the Rings just through the vent.
I’m contemplating leaving a polite note, but what do you even say? “Dear neighbor, please consider more fiber in your diet so you don’t sound like a construction site in the mornings?” Or maybe, “Could you please consult a doctor regarding your vocalizations during your bowel movements?”
Has anyone dealt with “loud” neighbors before? Do I just suck it up and buy noise-canceling headphones, or is it time to start banging on the wall in rhythm just to mess with him?
Follow-up question: Aside from the acoustic disturbance, have you considered if this daily ritual is actually impacting your ability to get ready for work or affecting your overall morning routine?