Blokes in waistcoats doing geometry for six hours while a crowd tries not to cough.
Fun fact: Ronnie O'Sullivan completed a maximum 147 break in five minutes and eight seconds, the fastest ever recorded.
Don't let the colour fool you, that stuff will clear your sinuses before you've finished the first spoonful.
Fun fact: Its Thai name, kaeng khiao wan, translates to "sweet green curry" despite being the spiciest variety.