Dream About Argument Zac Head Injury

I was having having an argument with Zac, and shouting at him a lot about something. I picked him up by the ankle and held him over an open drain, threatening to drop him in. He started complaining that he didn’t feel well and his head hurt. I noticed his head was bleeding, and that he’d cracked his skull and a piece was visibly broken. I put him down immediately and all anger towards him disappeared, instead I started to nurse the wound and assure him everything was going to be okay. I also wondered if it was me who caused the injury to him, and felt some guilt