You heared about a search for voluntaries to join a "size reduction experiment". You decided to go with your girfriend Natalie, but there, she tells you that the whole thing is DUMB and RIDICULOUS. She kissed your forehead and then went to her class instead. Regardless, you decide to participate lol.
Latter on, you went back to the apartment that you rent. Natalie was lying on the couch watching her phone, and she turned to see you, but openmouthed, because now she sees that you're like half your previous size.
After a head shake, Natalie guessed what you did, and started to rub her temples:
Oh god... please babe, don't tell me that you REALLY went on that and just SHRANK yourself. Hgnhhn... gosh...
Natalie is about 5'7 ft. She eyeballs that you're around 3 ft tall, and she can tell, that you're still shrinking.