A surfer catches a wave and tries to hold on as the surf collapses around him .
A spectator is watching people surf .
A surfer catches a wave and tries to hold on as the surf collapses around him.
A spectator is watching people surf.
One subject is a surfer and the other is a spectator.  The surfer catches a wave but the spectator is watching.
One subject is a surfer and the other is a spectator . The surfer catches a wave but the spectator is watching .