I’m so sorry for your loss of Smudge. I can only imagine what a magnificent personality a cat named Smudge could have.
There are many reasons why a rabbit may suddenly act that way.
Based on the context you’ve given, it seems unlikely that between the time of you hugging him initially, and then coming back from the shed, that Jojo somehow became hurt and was getting aggressive to defend himself (i.e. When a prey animal senses there’s something wrong with their health, they tend to get aggressive to fend off predators trying to get them while they are weak). But to be sure, I recommend taking a glance and seeing that Jojo seems OK healthwise.
More realistically, I can imagine a few scenarios:
1) If you went outdoors for a time, and your rabbit is not super-used to your outdoor environment (i.e. if Jojo is an indoor rabbit), you could have brought back scents of outdoor predators with you when you came back in, or just smelled unfamiliar in general. Rabbits do most of their recognition via scent. We’ve had rabbit owners on these forums who volunteer at rabbit shelters, and one in particular had to shower completely after coming back, or their rabbit would constantly attack them (to my recollection).
2) Grieving is a very intimate process that involves expression a lot of emotion. With that comes different sounds and body language. It’s possible Jojo heard you and your father grieving and/or sensed your body language, making him feel very insecure. Rabbits are very receptive of these sort of cues, so sensing that you were in such a state may have made Jojo feel scared. One of the most memorable times I’ve had with Wick being scared was when his other parent had the longest bout of hiccups (30 minutes). Wick was terrified the entire time because he had no idea what was happening to his other parent and his other parent was freaking out because the hiccups wouldn’t stop. Wick would run away from both of us until the hiccuping stopped.
— Is Jojo still acting this way towards you now? Is he acting this way towards Oscar right now?
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.