You've got your snowboarding, your luge and your BASE jumping from the Eiffel Tower. Some people push it a bit further and engage in train surfing, going downhill in a wheelie bin or nude hang-gliding. Free diving without oxygen is increasingly popular. There is still a place for the motorbike jump over a pile of flaming televisions.
But... they could all save themselves a lot of time and money, and get their thrills from Artistic Billiards. Its very big in Belgium.