An Overnight Weight Bump That Vanished by Sunday

I have been tracking my weight for eight months and am down 62 pounds. I weigh most mornings, but I make decisions from weekly averages. Two weeks ago, I had a strange glitch: after a lighter-than-usual Thursday, my Friday weight was up 2.8 pounds. Saturday added another 0.6. Nothing about my meals or movement explained it, and I felt fine. By Sunday evening, I expected the number to stay put. Instead, Monday morning it was down 3.4 pounds, below where I started. My weekly average only eased down 0.3 pounds, which is exactly what my log had predicted. The daily chart looked dramatic; the weekly line looked boring. That contrast helped me stop treating each morning as a verdict. I still note sleep, salt, and digestion beside the number, mostly so future me remembers that the body is not a calculator. What is the oddest short-lived bump or dip you have recorded, and did your weekly average calm it down?