My cat knows that I'll feed her if she acts sad enough xD

Her food's just outside my room so I'm the one who feeds her. She'll sit outside my door like MEOWMOWMOWMOWMOWMOWMOW for like, EVER, not taking a breath until I open the door. Then she'll just stand outside my door give me these sad eyes, and then after she's been staring for awhile, I just say "MEOW." She replies with "Meeeaaaoauo" and we just go back and forth like that until I get tired of meowing and close the door in her face. She'll then scratch the door until I open it again, and run inside. Next she decides to be even cuter and run around in circles scratching at an imaginary bug until she gets tired, and starts meowing at the door until I open it. She'll just stand there until I follow her to her food bowl and feed her, or just close the door with her still inside. The cycle repeats