baby jerks head backwards...normal or not?

[taffywelsh]

a couple of times a day my 5-week old baby will kind of fling her head backwards...
This only happens once at a time, so I never thought it was a seizure but now i'm second guessing

HELP!

[HappyMonkey]

The first month or so they don't have great control, so movements look like jerks as they practice. Sounded just like what my little one did too!

[remijo]

My baby was born with pretty strong neck muscles and would do this alot. She did it intentionally too so it wasn't just her head flopping backwards so I would say pretty normal.