Head hit floor

So my husband was changing my 2month old and was ripping his shirt off and his head dropped and hit the floor (carpet). I was in the kitchen when it happened and I heard a thump and the baby crying.
Should I be concerned? It might've only been a few inches drop but I didn't witness it and all I heard was a thud.
Anyone else experience this?
He was getting changed ON the floor, btw.