Here are the ones I can remember from memory:
Altered stride
Hand gesture directed at opponent
Diving with no threat
Turning head to yell at opponent
Any gesture that draws attention to self
list is below...if it's a finger or fist raised in celebration, then flagging it isn't just "over-officiating," imo. it's worse than that. it's making up your own rules. where's the rule support for a flag? I've heard some say that fits under "d" below, because it's "[focusing] attention upon [oneself]". but using that category ignores the wording of the rule. we don't have the leeway to flag any act that we deem as attention drawing. it first has to be either delayed, excessive, prolonged or choreographed. and i'm sorry, but I dont see how anyone can sanely characterize a fist in the air 3 seconds before a score as any of those 4 things.
Specifically prohibited acts and conduct include:
1. No player, substitute, coach or other person subject to the rules shall
use abusive, threatening or obscene language or gestures, or engage in
such acts that provoke ill will or are demeaning to an opponent, to game
officials or to the image of the game, including but not limited to:
(a) Pointing the finger(s), hand(s), arm(s) or ball at an opponent, or
imitating the slashing of the throat.
(b) Taunting, baiting or ridiculing an opponent verbally.
(c) Inciting an opponent or spectators in any other way, such as
simulating the firing of a weapon or placing a hand by the ear to
request recognition.
(d) Any delayed, excessive, prolonged or choreographed act by which
a player (or players) attempts to focus attention upon himself (or
themselves).
(e) An unopposed ball carrier obviously altering stride as he approaches
the opponent’s goal line or diving into the end zone.
(f) Removal of a player’s helmet before he is in the team area
(Exceptions: Team, media or injury timeouts; equipment adjustment;
through play; between periods; and during a measurement for a first
down).
(g) Punching one’s own chest or crossing one’s arms in front of the chest
while standing over a prone player.
(h) Going into the stands to interact with spectators, or bowing at the
waist after a good play.