NBA Rule 12-A-VII-c, "During an altercation, all players not participating in the game must remain in the immediate vicinity of their bench. Violators will be suspended, without pay, for a minimum of one game and fined up to $35,000.The key phrase is "During an altercation."
There was a blog somewhere else today asking why players aren't suspended when they stand up and cheer during a game.
This rule is about preventing a fight between two players from escalating into something bigger.
If there is no altercation, the rule is not violated.
I guess Tim got lucky. That's all.