Video: Kevin Garnett gives Mario Chalmers a friendly clothesline tap to the head

If you were wondering if the Miami Heat and Boston Celtics still have some bad blood considering the lack of defense in a wild first three quarters ... here's KG to answer that for you.

Went for the ball. Fair play.

But KG made sure to get a shot into the head there. Friendly-like.

The Heat led 97-80 early in the fourth.