Fallon London made this euhm... weird but fun movie for Cadbury Dairy Milk involving an emotional gorilla drumming on a Phill Collins song. Watch it here.
Cadbury's explanation goes like this : "Drumming gorillas, Phil Collins and Glass And A Half Full Productions? Well it just seemed like the right thing to do. There's no clever science behind it - it's just an effort to make you smile, in exactly the same way Cadbury Dairy Milk does. And that's what we aim to continue to do; simply make you smile. So if a drumming gorilla's not enough, wait until you see what else we have up our sleeves."