Is it okay that my baby moves really fast? pregnant?

I am 16 weeks pregnant and have just started being able to feel 'quickening'! When I felt it for the first time, I drank a glass of orange juice and laid on my stomach ( read it on ehow.com) And it really worked, so exciting.. But-- It didn't feel like little kicks, it felt like the baby was like, running and jumping in place? Is it okay that the baby seems to be moving soo quickly? Like so much? shouldnt it just be like, rolling over or scratching its head.. lol. not like,, dancing?