User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-28303251-20130410002348/@comment-1712810-20130410100234

Well, Goldbeard Ceadeus sometimes doesn't flinch when he's hit with the dragonator (or sometimes it takes a few seconds, possibly due to online lag) but I know it hits him... so it may just be that the dragonator doesn't cause enough damage to invoke a flinch sometimes. If you're playing solo (and depeneding on the weapon used) how often a monster flinch can vary to a degree. That said, if you hit any part of him with the dragonator, he's definitely feeling it, even if he isn't showing it.