It's called Riddling http://www.winepros.org/wine101/vincyc-riddling.htm or watch it here http://www.youtube.com/watch?v=MetGp4Q6dG0&feature=related
Riddling? Don't you need a green suit and mask for that?
http://vinroc.deviantart.com/art/Riddle-Me-This-46273085?moodonly=1