Well, it was everything you might imagine. My first big tractor project. I've got my hoses, antifreeze bottles, filling valve. I've got the tractor rear up on jackstands.
Of course with my wheels configured the way they are the valve is on the inside of the rim. And as fate would have it, I'm under the tractor on my back. I think I was looking to see where the oil drain plugs were for the upcoming 50 hour service. So while I'm down there I figured I'd go ahead and take the valve stem off.
Now I have NO reason to think there is fluid in the tires. I was told there was not. So I just spin the sucker off and then woosh. A literal geyser. Total surprise and confusion. Spitting. Sputtering. Trying desparately to get the thing back on before it empties....which I finally did somehow. I'm sputtering, cussing and trying to get the stuff out of my eyes. I still don't know what kind of fluid is in there.
No one was there to see it, but by this time I'm crawling out from underneath and starting to laugh at myself when my very disinterested teenage neice and daughter ride up on horses. They have the social decency to ask what happened but ride on by before I can explain.
Ever see the Three Stooges plumbing episode? That's all you really need for a mental picture.