Injured Player: When Do You Stop Play?

[crazy voyager]

If they set up their offense. I let them end it. How ever, I have had teams who simply stop playing offense. Then I stop play, it's there choice. But unless the player is badly injured or as it says, needs protecting, I let them play things out...
If they take a shot, grabs the offensive rebound, and sets up again I will call it dead though (the play has been completed, so call it dead, no need to start a new offensive set).

[MJT]

Had it last night where a player sprained his ankle with 8 seconds left and the winning team got the ball, came down floor and the game ended. Players and coaches were both ticked we didn't stop the game. A few seconds later the kid gets up and walks off.