True story: when I was 17, I was socially awkward at a party, so I stood in the kitchen next to one of those fridges with a built in water dispenser and just kept refilling my cup whenever it was empty. After a couple hours I felt a little weird, so went to sit down in the living room. My uncle came over to talk to me and then abruptly accused me of being drunk because I was apparently slurring my words. I was water intoxicated (literal over hydration) as a consequence of osmosis. When I ingested large quantities of water, the salt concentration of my blood decreased, which caused water to move ___ my cells and ___ my blood stream, which caused brain .