It isn’t always easy to tell without seeing it yourself, but it sounds like they were 3 males. A dominant male will roll up several males if he happens upon them. I had one male here once who had 3 other males rolled up and he was (alternately) circling two different females! I’m not sure the females were impressed when he kept dashing off to make sure all the males stayed rolled and circling the other female! But his stamina with all that rushing around was quite impressive.
The hog there may have been making sure they both stayed curled up. But there may also have been a female around – out of sight. It’s usually the females huffing which attracts people’s attention, so it may be that which awoke you. Males don’t normally biff and curl female hogs up, but it does happen occasionally, seemingly by mistake.