If it's dark and I see a light at just tge right angle, I see an image of the blood vessels inside my eyes.

I can hear baselines (from blocks away!) that my family can't hear at all. Or, hear isn't the right word, but I feel it as an ache in my ears and head.

I can see an actor and know immediately whether they guest starred or were an extra with a line in the TV show Wings.

I can taste water, irl no one I met really can feel the different tastes of plain water but i can

My nose is more sensitive than average to certain types of foul smells mostly in the poop and rotting organic material categories but also things like mouse / rodent urine, skunks, and cigarette smoke. Oh joy.

Mostly it makes me feel like I'm going crazy because I smell these things when nobody else seems to notice leading me to wonder if I'm just hallucinating the smell. But sometimes I put it to good use by being the early warning system of skunks in the area and sometimes I'm the first to notice when the milk is starting to go bad.

Older TVs I could "sense" when they were turned on or off like a room over.

Constant droning Like tinnitus except very low-pitched. Probably caused by intracranial hypertension.

i can hear power supplies. kinda annoying.

The chemical most places use for drycleaning is perchloroethylene, or perc, which can contaminate groundwater if not stored or disposed of properly.

I'm a super-taster and thanks to lots of childhood abuse I'm hypervigilant. So pretty much everything. If a person anywhere in the area has been smoking or in a smoky room any time in the last day or two, I'll know it. I know what you last ate - and drank, if it wasn't water. I can hear a woman sobbing quietly in a locked room down the hall when nobody else can.

I see beauty in the clouds in the sky at night. I smell faint smoke on the wind. Scents that remind me of long ago, when I was a child - like the smell of shrinky-dinks coming off a hot metal mold, or pastries coming out of an Easy-bake oven. Autumn leaves swirling in an icy breeze. Or the smell of something like earwax, or tar.

I often wonder how normal people live without sensing so much of the world!

I think I can see more colours in the stars than most people. I can also tell the northern lights are coming up earlier, so probably just low-light cone sensitivity.

A wasp died in a vent a bit ago and it smelled awful to me, but nobody else could perceive it at all.

I don't have a sense of smell but I can still smell if it's cold or hot outside.

Ah I can hear security cameras sometimes.

I can see dead people.

Mold, or at least some types of mold. Used to smell it on food but other people couldn’t, so just assumed it was something else. But did the experiment by putting things in their own containers and leaving them out for a while, while probably not the best sample size, the muffins that smelled like mold eventually visibly showed it.

I don't know what it is, but I can smell a somewhat metallic type smell on some specific people's breath. It always smells very similar between different people. They generally aren't very healthy, but no one seems to know what I'm talking about.

I'm very near-sighted. Also means I have a built-in microscope.

The flickering of my parents old Plasma they can't.

I can sense when it's time to wake up, while asleep.

It's likely just confirmation bias, but I almost always wake up minutes before my alarm if I have a stressful or unusual appointment, like an early flight or interview.

I assume most people has this with their routine wake-up time, that the body learns when to wake up right on time... but this is like: if I usually wake up at 8:30 but now have to wake up 5:45 or 6:15 or whatever, I'll wake up on my own right before the alarm goes off. I just need to think about it somewhat thoroughly (wake-up time and approx. how many hour of sleep until then) before falling asleep.