On the Bryant-Artest play, the two were battling for rebounding position when Bryant struck Artest with his elbow. Artest immediately began gesturing and arguing that he had been elbowed in the neck, but replays appeared to show Bryant's elbow striking Artest on his upper chest, just above the "R" on Artest's Rockets jersey.
Rule 12, Part A, Section 5-Q of the official NBA rule book cites: "Elbow fouls which make contact above shoulder level, and punching fouls, although recorded as both personal and team fouls, are unsportsmanlike acts. The player will be ejected immediately."