Bet you wish you had, now. 

On the radio, they made it sound like Pereira had fumbled it late on when Hibs "scored", but he clearly had the ball in his hands before the Hibs boy literally punched it out of his grasp.

​So the big question is: as I understand it, a handball is only a yellow / red card if it stops the opposing team from building up an attack.  If the ref hadn't spotted it there, it would literally have changed the result of the match - should that not carry some sort of punishment too?  It's not like he was just having a laugh, and would have owned up if the ref hadn't seen it.

I always understood it that a deliberate hand ball was a straight red card. He was also trying to conn the ref so no matter how you look at it he should have walked. ( absolute minimum a yellow ) 
The biggest problem with officials is lack of consistency, for example Brown gave away a penalty directly in line with the goals, now if that is not a goal score opportunity I don't know what is, yet he didn't even get a yellow.
Refs make mistakes ( it's only human ) but sometimes they deliberately help certain teams and the main thing with the bigot twins is they have a settled consistent team, so each player is very familiar with each other and how they play. Constantly chopping and changing a team ( Levein ) does the players no favours and by not handing out the obvious cards the Glasgow crap get away it.
Celtic are always top when it comes to the least number of cards and with decisions like this is it any wonder.
Thought Hibs got more than their fair share of fouls especially with Uche, who no matter who is fouling who, he never gets a decision. Now surely at some point he has to get the benefit of the doubt.