3 AM and my bathroom sink started making this hollow gurgling sound
I live in a duplex in Portland, and last night around 3am I was up reading some dumb clickbait when the bathroom sink just started gurgling like it was choking. Not a drip, not a clog, but this deep hollow noise that went on for maybe 10 seconds. I froze, checked the pipes underneath (nothing wet), then flushed the toilet to see if it was related - sink stayed quiet. No idea what caused it, but I'm half-convinced my upstairs neighbor flushed something weird. Has anyone else heard random plumbing noises at night that totally messed with your head?