I haven't watched the Bulls-Heat game tonight, but after checking the stats at the half, I've come to the conclusion that this halftime line is pretty good. The Bulls have a large differential compared to the Heat in four significant statistical categories:

FG%: Bulls: 44%, Heat: 52%

3-pointers: Bulls: 2-for-9, Heat: 5-for-9

Assists: Bulls: 14, Heat: 10

Turnovers: Bulls: 11, Heat: 4

Since field-goal and three-point percentages are usually a matter of luck, which evens out over a period of time, I like the Bulls to have a better percentage in the second half than the Heat. Also, because the Bulls have bettered the Heat in terms of assists, they are moving the ball more effectively than the Heat. Finally, turnovers are a stat caused more by the offense's mistakes than the defense' pressure (although pressure does contribute), so I expect the Bulls' turnovers to decrease in the second half relative to the Heat.

The Bulls are down 52-45 at the half. The halftime line is Bulls +1, meaning that the game line on the Bulls is +8 if you take this bet. I think it would be a wise move because of the above stat differentials.