Feeling like a rats arse

Why is it when you are feeling like the title, and you need to sleep, you can't?.
I could not sleep finally dropping off around 2.00am the morning, I have been awake for about an hour.
In the end thought I would arise and blog, just to pass some time. Hope you all enjoyed the festitivites of last night. Actually there is probably a fair proportion of you, that are feeling like the title too, through the excesses of last night.
For christmas my mother bought me a book titled "500 of the Weirdest & Wackiest Web sites. I spent a fair amount of time yesterday browsing. One of the wackiest I looked at was Cow-Tipping.
Bizarre, have a good 2007 all.