Kind of a poor attitude G.
If you read a little more closely, the dude with a broken leg wasn't in their group. Just someone they volunteered to help.
And it's sure as sh!t nice to ask if you can help in a situation like this rather than waiting to be asked. If that was me with a bad injury, I'd certainly be more appreciative of people volunteering than having to be asked.
But I hope you feel good about asking if you should move your stuff. That shows loads of concern.