The World Cup rumbles on and it's had its fair share of drama this time round. Shock early exits, team mutinies and more than a few complaints about the ball being used.
The Adidas Jabulani is allegedly the most sophisticated ball ever made. But a lot of the world's top players don't rate it. We've already contacted both Adidas and Nike to get their opinions on the performance differences between their footballs and examined for ourselves what might be going on.
But, if you'd rather sit back and watch an informative science lesson instead, then this is a splendid video from a team from the University of Nottingham which provides a superb insight as to what's going on as well as featuring the rare treat of men in lab coats playing football.
Who would have thought that having a kick around was so complicated?
If you've seen a video online that you want to tell us about email us via the feedback form.