The man is performing a trick on a motorcycle high in the air.
A man is performing a trick on a bike.
A motorcycle is an electronic bike.  A bike trick is a motorcycle high in the air.
A man is performing a trick on a bike is the same as man performing a trick on a motorcycle as bike and motorcycle are used synonymous as part of the original description.
The man can only performe a trick high in the air because he is on the motorcycle.