Lebron was hanging around when Orlando should have held the ball, yet they tried an alley oop to Howard, which failed......Etiquette violation #1.
Cavs ran down with uncontested layup, and then Howard throws up a 3 at the buzzer.........Etiquette violation #2.
Only then did Lebron turn around and walk off the court.
Shaking hands after an end of season loss is tough to begin with, yet nearly impossible when the winner pulls these stunts.
Who cares, and if you do, look elsewhere other than Lebron.