JVG is right. If I'm the Mavs, I'll let James piddle around for 20 seconds all night long. Especially, if he ends up shooting a 21 ft fade away. He's gonna make plenty, but I'd let him try every time.
Dallas needs to decide if they are going to make any attempts at stopping the easy slam dunks. They need to hard foul Wade or James if they pull that crap. Let them know that if they go to the rim they may have to pay for it.
Nothing they could do on the breakaway dunk. But it is time for Haywood to land a haymaker. Knock somebody on the rear when they drive. Or blockout with an undercut and it will stop the pellmell rebounding dives.