Unborn baby spazzed in womb

Dominique💕🖤
I was sitting on the couch , chilling and mind you I'm 7months pregnant. Babys moving around just fine. Just occasionally moving his little arm or kicking. And then all of a sudden out of no where he spazzes it honestly felt like he was having a little temper tantrum in there I was watching my stomach move like 'wtf' lol has anybody else experienced this? I'm 29 weeks