A child fell over in the playground, most of the time you see this happen, they shake themselves off and are up and running again. This child fell down and looked like he really bashed his knees and was quite understandably crying, I waited for a bit thinking that his mother would probably be over in a second to at least pick him up, brush him down, cheer him up but no, no parent made a move. So I did. I helped him up, asked him where he hurt and whether we should get a new set of knees for him and reduced him from 'can't talk' bawling to sniffles. I then asked where his mum was and he pointed to a woman with her back to us just chatting to her friends. She looked really quite angry with me for bringing back her crying child to her and looked even more cross with him and then proceeded to tell him off. I said nothing, went back to my own child.
I was a bit 
that she was cross with me. I don't think I was unreasonable for going to pick up a crying child, it's what you do isn't it? Is there any reason (because it would be MN that would tell me) why it would be unreasonable to make sure an obviously distressed child was ok