The ball might have hit Ervin Zukanović's hand. It might not.
Either way, the Bosnian's arm was across his midriff when he was hit by Daryl Murphy's cross.
It was an incredibly harsh decision from a Bosnian point of view and a real gift for Ireland.
That didn't matter to Jon Walters who slotted the penalty confidently past Asmir Begovic.
Compared to Martin Hansson, Bjorn Kuipers is certainly a name Irish fans are going to remember fondly regarding a handball decision.