Source: DallasNews
Call me a Western Conference snob. The Heat has no chance (have no chance? I don't know, why don't they get a real nickname?) in this series.
The Heat wants to play games in the 80s because it isn't good enough to score 90.
Source: WashingtonPost
When they saw a headline in one of the Dallas newspapers calling the Heat an "Unworthy" opponent after the first couple of games, the Miami players seriously took offense. Before many others caught on, Wade, who is something of a techie, was online and got a whiff of city officials planning a celebration after the first two games of the series: "They'd already set up Parade.com. They already had their parade route and everything."
Miami's players and coaches didn't like that, either.

That in itself was the cause of the Mavs losing, just the fact the city was preparing for a parade after 2 games.