It's only polite; give a gift, receive a gift in return.
Having seen Chelsea's David Luiz do everything but roll out the red carpet for Cardiff's Jordon Mutch to score the opening goal of the game at Stamford Bridge on Saturday, visiting goalkeeper David Marshall evidently thought he should return the favour to his hosts.
It's only good manners, after all.
Not quite as cheeky as the infamous Dion Dublin effort against Shay Given, but nevertheless, it allowed Eto'o to get the ball to Hazard, before the Belgian ended up finally turning home.
Still, we would not want to be in Marshall's shoes at half-time, trying to explain that one to manager Malky Mackay....