9 week flutters??!!

I've always thought you couldn't feel baby flutters until around 13 weeks with a second pregnancy, but after feeling some strange movement in there tonight I googled it and tons of women in their second or more pregnancies reported blatantly feeling flutters as early as 8 weeks!!!??? This is so crazy. For fear of being made fun of here aside, have any of you ladies experienced this? It's not gas, lol.

It felt as if you were to hold and egg and shake it, you could feel the motion...only inside.