[ cw ] write about the strangest/scariest/saddest dream you 've ever had in less than 200 words .

Not an entire dream, but a specific part of dreams that I have every year, roughly once a year. The earliest I remember this happening was when I was 7 or so. The dream would start out normal ( as normal as dreams get )... 
 
... and then I see my grandmother on a rooftop. Any rooftop. She's holding a cheap plastic water bottle and drinking from it, then she holds it out and offers me a drink. I can clearly see that the liquid (? ) inside the bottle is indescribably filthy, and there are *things* living inside. I refuse and run away. At that moment, everyone around me starts chasing me. As the chase progresses they get more and more incoherent and angry. Eventually I am backed into a corner or forced off a high place and I wake up the moment before I die. 
 
 The dream itself is n't too strange, only memorable because it is so specific and terrifying, as well as the fact that I get it once a year.
