For those of us not graced with the indomitable pleasure of living within the bounds of Her Majesty's United Kingdom, I believe these video clips parlay the original intention of CaptainWacky's thread:
Yahoo Science video of what I believe is the same clip, but feel free to correct me.
The origin of my knowledge of male giraffe battles came from QI:
[YOUTUBE]2fkM5w8KwNY#t=903s[/YOUTUBE]
You don't have to watch the whole episode - for some reason the "current time" formatting isn't working for me here in the forum. They start talking giraffes at around 10:40, and the topic of fighting amongst male specimens begins at 15 minutes in.