Stiff as a board?!

When DH climaxes when we are engaging in traditional “woman on top” intercourse (think missionary but with me on top), he always speeds up, then repositions his legs straight and close together, and then stops thrusting for a few seconds as he ejaculates....of course I keep moving but it slows down the momentum. Anyone else’s SO do this?! 🤷🏼‍♀️🍆💦

I have never had any sexual partners aside from my husband do this so I’m wondering if it’s normal.