I found this article about Austin and Ally fun facts: http://www.teen.com/2015/07/12/television/austin-ally-fun-facts-trivia-bio/
"5.Sneeze probs. Raini Rogriguez previously revealed that Ross is almost always sneezing. When he makes a face on the show (that looks like he is taking a big breath), it is because he was about to sneeze when the camera quickly came back to him. He sucks in to prevent the sneeze and ends up making a pretty wacky face in the process."
YES!