I'm writing a story where a child is kidnapped by someone who has the super power of super speed. The idea is that the kids arm would be yanked or twisted on during the kidnapping and injured in some way.
The kid will be rescued, in which he needs to be able to tolerate (doesn't have to be tolerated well, and I'm banking on adrenaline doing some heavy lifting here for initial pain management) being carried in the arms of another adult for probably around 30 minutes as the adult walks them back to a safe place.
The idea is that the position he's being carried in is where his legs will be around the adults waist/kinda propped on the adults hip, and holding onto the adult around their neck/shoulder with his good arm and the injured arm tucked between their bodies for stability.
On the walk back to safety they'll briefly stop at a park bench where very minor first aid can be applied (ie, fixing the arm in a makeshift sling using the jacket the adult is wearing. The adult will not have any actual first aid supplies on their person)
The idea is for them to have a brief, emotional bonding moment during this stop. The kid has to be coherent enough to process words being said to him and respond in minor ways, so he can't be in so much pain all he can do is scream or is blacking out.
Once back to safety, in about an hour the kid will be seen by a medical professional who also has the super power to heal/regenerate body tissue (She can use magic to mend a broken bone, heal cuts and torn tissue, but not necessarily resolve residual muscle/ligament strain, swelling, bruising, etc.). This is where she'd either mend the broken bone, or reset the dislocated shoulder. However this is going to be taking place inside of a residential home, so ideally she would need to be able to do this without medical equipment (some room for non-realism here because magic).
At the end of the night, the kid needs to be able to crawl into bed by himself and sleep on his side.
Would a bone break or dislocated shoulder be more fitting for this? Or, something else all together? I have experienced neither of these so I have 0 point of reference for what the pain would be like before and after treatment.
EDIT: the child is 6 years old