When a spectator or other person not associated with one of the teams (including such staff as bat and ball boys/girls) alters play in progress, it is "spectator interference", colloquially called "fan interference". It is worth noting that the latter is also (incorrectly) used to refer to fan obstruction – for instance a spectator running onto the field and tackling a baserunner. The ball becomes dead, and the umpire will award any bases or charge any outs that, in his judgment, would have occurred without the interference.