View attachment 88791 It's a stage opposite the PotC entrance. There would be no reason to suspend the show, it's not part of the ride.
If your son really wants to be picked, he will increase his chances greatly by sitting right up front at the rope, smiling a lot and enthusiastically doing everything the Captain and his mate tell the kids to do. They'll ask all the kids to stand and put there arms up, do jumping jacks, etc.
my DD was desperate to be picked and wasn't .... She made me go back and sit through it over and over again. On the fourth or fifth time, I asked the photo pass photographer if anyone could let Captain Jack know that Becky's mom would be forever grateful if Becky could be picked so that I could do something else with the rest of my day. She got picked that show ... Not sure if it was connected.