I actually hit on the dumping thing after going out one hot day for a ride a bit longer than I should have done, and found myself about 3 miles from home, lightheaded and vaguely nauseated, feeling like I was unable to cool off, even though I pulled off to the side of the road. I was running sweat in rivers. A nice young woman stopped and offered me some water. I said, "Yes, please! Could you dump it on my head and back?"
She thought I was crazy, but it worked like a charm! If I hadn't already made The Call Of Shame, I would have been able to make it home without The Ride Of Shame.
I later realized this was mile heat exhaustion, which I find I'm prone to on the first warm ride most years, but then not again the rest of the season. Weird.
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"Don't take life so serious-it ain't nohow permanent."
"Everybody's gotta be somewhere." - Eccles