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Volcano surfing is the latest extreme sport craze.

The young quad racing competitors showed up for the event. Some failed to perform well.

River buggers speed along a river and down the rapids.

He drove his ice axe deep into the slope of the snow-covered mountain.

A large group of divers took their diving boards underwater to set a world record.

Ice climbing up a steep slope is quite challenging.

Without webbed gloves, it is difficult to control your river bug.

Grammar makes it difficult to.