Daisy calls me one day at work and says "there's something wrong with the bathroom wall" which isn't something good. I wasn't hoping Daisy would have been exaggerating and it would have been something stupid like a bug stain or something. Nope, it was a good bit of water made quite a mess with the paint and the drywall.
Came from the ceiling (obviously) and took some of the popcorn ceiling with it.
Had to take a blade and cut the water out of the drywall before it made things worse.
Then spackled and primed the wall for good measure before I repainted it. Used the same primer to seal the ceiling stain. Oil-based primers are the best at blocking water stains, so Kilz Complete is one of the strongest versions of Kilz around. Luckily I don't mind messing with oil-based anything as long as I can spray it. It did the trick.