Match the heading to the short text.

This is an extreme gravity-powered activity that involves riding a street-luge board down a paved road. It is often done for sports and for recreation.

• STREET LUGE
• PARAGLIDING
• MOUNTAIN BIKING
• WINDSURFING
• WHITEWATER RAFTING
• ROCK CLIMBING
• SPEED SKIING
• FREEDIVING
• MOTOCROSS
• ZORBING