Thanks to technology, sports fans have the luxury of second and third guessing umpires who have a split second to make a call.
FORBES: The Plight of The Umpires And The Inevitability Of Instant Replay
Line decisions - stumpings, run outs and boundaries - are at present routinely referred to third, or "television", umpires.
BBC: Umpires enter new era
If players do not agree with the decision made by the on-field umpires they can refer it to the third umpire.
BBC: SPORT | Cricket | Players set for right of appeal
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