The epiglottis itself can be seen as a "seagull" or inverted flat V (arrows). The tilted epiglottis has deflected the bolus into the lateral food channels, creating a filling defect or "pseudomass." ...

epiglottis inverted, UES begins to open. e: Pharynx constricts, tongue base against pharynx, maximum hyoid elevation, UES open. f: Bolus tail through UES, structures returning to rest.