increase happiness. increase productivity and bring, you know, team building. mainly that happiness factor because some people are starting to realize actually above everything else, happiness is the number one thing your staff, your team needs in order to be productive. >> reporter: so it doesn't matter if you're a fat cat or an angel investor. for these ravers here, there's really no excuse for not letting your hair down. cnn, london. >> some very, very peculiar costumes there, shall we say. all right. on the greek island of crete, a billy goat lived up to its reputation of being stubborn. here you see him sauntering onto the pitch right in front of the goalkeep goalkeeper. only to have him scamper back to guard the goal. finally a spectator took charge of the situation. he grabbed the goat by the horns and led him from the pitch.