Light play example 2
is light, because it doesn't place too much importance on the stones.
Black here seems too interested in cutting White. After , it is clear that Black has bad shape. The cutting points at a and are both serious.
If Black concentrates on capturing White's two stones, White will be happy. The ponnuki with gives White good shape; and Black has a problem.
Black has changed the order of play by cutting immediately at . That goes against the 123 principle. In this case Black has no good way to continue. Black at b isn't interesting, but there is nothing better.
White should be reluctant to play here, in order to connect together securely. This is heavier, and the exchange of for is a local loss.
Bill: Calling heavy seems unwarranted, since it occurs almost as frequently as the immediate jump in professional play.