off ball hand checking again

[Rbn3]

is the situation where I see the most off-ball tagging, touching etc. (But some teams also seem to be taught to keep a hand on their man in rebounding situations, as they are watching the ball and not their man.) Basically the defender uses the tag or touch to "keep track" of the defender behind him. This varies from an occasional "tag" to nearly continues touching. Sometimes the offense player pushes or sways the tag away - occasionally this escalates.