I was just down at WDW last weekend with my wife for our anniversary and were in the FP line at the AK Safari. we were standing by the opening for stroller parking when a dad came back up the queue with his son in his arms. he went to go past like he was going back to the entrance of the queue when my wife told him if he needed to get out of the line, he could just go out through the stroller parking. he did that and no more than 15 steps into the stroller parking, his son fed the fishes! thanks to my wife, people behind us in line didn't get puked on! then, as we moved our way up towards the loading area, we saw where the boy first got sick, all over the ground. hey, it happens. but, they didn't remove anyone from the queue. and it happened to be one of the best safaris we have done.