It's the testosterone caused by the exertion.
A work mate of mind was a distance runner. By the end of his run he was so testosterated he could literally shove people out of his path, only to confess, shamfaced, an hour later over a cup of lovely tea.
I'm not sure I have ever exerted myself to...
I was held up for 15 or 20 seconds on the way to the football the other day by a cyclist. I was absolutely livid.
Oh, hang on. No, actually I wasn't.
I though the original post was very amusing, @Stat Brother. Wasn't you, was it? ??? :lolol: