private weaponFired_(player : LocalPlayer, weapon : any) {
    switch (weapon.type) {
      case Weapon.Type.GUN:
        this.resourceManager_.playSound('gun' + weapon.level);
        break;

      case Weapon.Type.BOMB:
        if (weapon.vel == Vector.ZERO) {
          this.resourceManager_.playSound('mine' + weapon.level);
        } else {
          this.resourceManager_.playSound('bomb' + weapon.level);
        }
        break;

      case Weapon.Type.BURST:
        this.resourceManager_.playSound('burst');
        break;

      case Weapon.Type.DECOY:
        this.resourceManager_.playSound('decoy');
        break;

      case Weapon.Type.REPEL:
        this.resourceManager_.playSound('repel');
        break;
    }
  }

 /** Called when the local player toggles multifire. */
 private toggleMultifire_(player : LocalPlayer, enabled : boolean) {
   let resource = enabled ? 'multion' : 'multioff';
   this.resourceManager_.playSound(resource);
 }

 /** Called when the local player bounces off a wall. */
 private bounce_(player : Player) {
   // If the player was speeding, play a sound on the bounce.
   if (player.getVelocity().magnitude() > 1) {
     this.resourceManager_.playSound('bounce');
   }
 }

 /** Called when the local player collects a prize. */
 private collectPrize_(player : Player, prize : Prize | null) {
   this.resourceManager_.playSound('prize');
 }

 /** Called when the local player captures a flag for the team. */
 private captureFlag_(flag : Flag) {
   this.resourceManager_.playSound('flag');
 }