People they already start looking at close plays before it is ever challenged. There are guys sitting there waiting for a close play to be bumped over to them to look at. The time the manager is sitting on the top step holding up the game it is already being reviewed. It takes long because they have to make sure there is nothing not obvious that could be the call a different way. Like oh he is obviously safe, but wait his hand actually popped off, but we rushed it and missed it.