Motorcross GP is usually the more sedate cousin of its high-risk relatives Supercross or FMX. But at the recent World Championship race in Trentino, Italy, Steven Frossard discovered that it can be every bit as dangerous.

Taking a tumble, he looks like he's escaped almost unscathed, despite a very near-miss from another bike. But then the second bike comes along...

The way he slumps to the ground, he looks as if he's been knocked clean unconscious. Ouch!