Excessive celebration is rule 9-2-1d, which states a penalty is called for:
"Any delayed, excessive, prolonged or choreographed act by which a player attempts to focus attention on himself (or others)."
Seems one player didn't know this rule today.
"Any delayed, excessive, prolonged or choreographed act by which a player attempts to focus attention on himself (or others)."
Seems one player didn't know this rule today.