St. Louis Rams running back Steven Jackson recently said that Seahawks rookie Aaron Curry hasn’t learned how to be a professional yet.

Now Jackson himself has been reminded of one of the realities of being a professional football player: If you celebrate a big play in a way the league office deems excessive, it’s going to cost you some money.

Bill Coats of the St. Louis Post-Dispatch reports that Jackson has been fined $5,000 for throwing the ball into the Edward Jones Dome stands on Sunday after scoring a touchdown.

For one lucky fan, Jackson’s celebration made for a nice souvenir. But for the NFL office, Jackson’s celebration was not the way a professional football player should conduct himself. And now Jackson’s paycheck will be $5,000 lighter.