Alex Smith ran the 49ers' second-unit offense on Saturday, got booed loudly several times after making throws nowhere near his receivers, and Mike Singletary loved it, according to Tim Kawakami. ?Outstanding,? Singletary said later of the boos. He said he wants to see Smith endure all kinds of things and see how he reacts. Today, Singletary said he was happy with Smith?s reaction. Smith?s response, when we asked about it: ?That?s part of the deal of playing quarterback.? He did allow that he was a little surprised the crowd was as big and as loud as it was for the morning session.