My weird "paranormal" quirk is knowing when someone is sick by smell. My nose is usually blocked up and I can barely smell flowers but for some reason I can just tell when someone is incubating some sickness that will make them bedridden the next day.
No idea how it works. I just smell "sick" - it's kind of this warm earthy ground smell. I can even smell it on myself sometimes and I'll know I need to take a day off tomorrow. My theory is I can smell something off in the skin temperature.