Water-logged!

I've heard of gaining weight because of water retention, but this is ridiculous. I was 166 pounds when I stepped on the scale Monday morning. This morning: 170.
It was 5:30 a.m. and so I was a little groggy, up early to run with the Luke's Locker group. So I got off the scale. Adjusted it. Got back on. 170.
I went to the bathroom and got back on the scale. 170.
What the #%&*@#*
How can this be? Four pounds in one day?
I thought back to what I ate Monday: A glass of soy milk in the morning. A sandwich and soup from Panera Bread for lunch. Some sourdough pretzels and chocolate moth balls for a mid-afternoon snack. Some chicken noodle soup for dinner with a glass of wine. A cinnamon roll for dessert. A cup of hot tea sweetened with blackstrap molasses before I went to bed.
This hardly looks like a feast for a King.
After my 6-mile tempo run (in 48:54), I got back on the scale. 166.
But I know better. You are always lighter after a run because of the water you lose through perspiration.
If anybody has an idea of how I can gain four pounds of water in one day, let me know.

Additional item
It's April Fool's Day. Click on the web site aprilfoolsdayontheweb to see how many of us were duped today. (I'll admit. I tried sending a Gmail message back to the future.)