bonusPlayer1Timer = new Timer(5000);
            bonusPlayer1Timer.addEventListener(TimerEvent.TIMER, bonusChanges(player1));
            bonusPlayer1Timer.addEventListener(TimerEvent.TIMER_COMPLETE, bonusChangesRemove(player1));
            bonusPlayer1Timer.start();

function bonusChanges(event:TimerEvent, playerBonus:Player):void {
    switch (playerBonus.bonus) {
        case 0 :
            playerBonus.multipleShooting = false;
            playerBonus.bonus = -1;
            break;
...}}

1067: Implicit coercion of a value of type Player to an unrelated type flash.events:TimerEvent.
1136: Incorrect number of arguments.  Expected 2.

public class PlayerTimer extends Timer
{
    public var thePlayer:Player;

    public function PlayerTimer(delay:Number, repeatCount:int=0)
    {
        super(delay, repeatCount);
    }
}

bonusPlayer1Timer = new PlayerTimer(5000);
bonusPlayer1Timer.thePlayer = new Player();
bonusPlayer1Timer.addEventListener(TimerEvent.TIMER, bonusChanges);
bonusPlayer1Timer.addEventListener(TimerEvent.TIMER_COMPLETE, bonusChangesRemove);
bonusPlayer1Timer.start();

function bonusChanges(event:TimerEvent):void {
    var playerBonus:Player = PlayerTimer(event.target).thePlayer;
    switch (playerBonus.bonus) {
        case 0 :
            playerBonus.multipleShooting = false;
            playerBonus.bonus = -1;
            break;
...}}