“When you’re done screaming, pull the mask down over your nose and mouth and breathe normally.” What did he say? The entire plane was laughing and now listening to his every word on emergency airline procedures. When I booked our tickets with AirTran I was uneasy. Traveling can be stressful; traveling with a daughter in a wheelchair can be extremely stressful. Too many times I have had to watch her cringe with embarrassment because even though I informed the airline online, called and asked several agents for help-the straight-back chair was not at the gate in time for boarding. Arielle would have to be rolled to her seat in front…