A man has wrecked his racing bike in the dirt with five spectators behind a rope.
A man has damaged something.
If the man wrecked his bike, he has damaged something.
A man who has wrecked his racing bike  while five spectators are behind a rope and has damaged something, implies that he is in a motorcycle race and got hurt while racing.
Wrecked and damaged can be used interchangeably. A bike is a noun, allowing it to be referred to as something.