A guy on a skateboard does a trick on a ramp while others watch on the other side of the ramp .
It is certain that a man in a blue hat and goggles grinds his skateboard down a ramp .
There is almost no chance that a man in a blue hat and goggles grinds his skateboard down a ramp .
It is certain that a man in a blue hat and goggles grinds his skateboard down a ramp .
A man in a blue hat and goggles grinds his skateboard down a ramp .