While searching for 'capa de chuva', I found some images relating to a recent episode of Big Brother Brazil. The contestants put on raincoats and stand under umbrellas and pull a cord to get showered with coloured fluids. The game is similar to the one on the Ellen show but she never lets the people wear any protection! At present I can't find a decent video, only this rather poor one but you get the idea.
Phil
https://www.youtube.com/watch?v=s9vp1vUmiCg