Watch some of the forgotten moments from previous World Championships in Sheffield.
Former world champion Graeme Dott has a shock and Alex Higgins has an argument in front of the Crucible crowd.
BBC Sport will bring you live coverage of the 2015 Snooker World Championship from Saturday, 18 April across BBC TV, Red Button, connected TVs, online, tablets and smartphones. Viewers can also watch live coverage of both tables at the Crucible via the BBC Sport website and Connected TV. Dedicated streams will be on hand until Thursday, 30 April, when the tournament goes down to a single table.
The BBC is also hosting a festival of live programmes and free events to celebrate the World Snooker Championship across the city of Sheffield. For information on free tickets to these programmes and more, visit the BBC Shows and Tours website.