Hiccups?

What does it feel like when the baby hiccups? I'm 29 Weeks as of today. And sometimes her movements will be one or two minutes apart and they feel the exact same, usually her movements will feel different everytime. But sometimes I get those that feel the exact same. Or I'll get two or three movement at a time. I don't know if they are hiccups though. What do they feel like. We could see at my 20 week appointment that she was hiccuping but I couldn't feel it. I just expected to feel a little more than her kicks and twitches.