How to check carbon frame for cracks Yesterday, a little boy hit my carbon framed road bike with his little bike while I was already standing. He was not very fast, the normal 'little-boy-dreaming-on-his-bike'-speed. So, nobody got hurt, but his mum wanted me to check the frame, she was very sorry and apologized hundreds of times.
After a first look, I can not see any visible cracks or something.  

Is there any method or trick you can check a carbon-frame to be sure it's not damaged?
Can there even be some cracks you do not see?
(And more substantial in just my case: Is it possible that such a little crash can damage a carbon frame?).
If no one was hurt then you are probably good.   

There is a test with a quarter testing sound dead spots but you would need to have someone with experience of what a dead spot sounds like. 

I takes a bit to fracture a carbon.

frame failure testing 

fork and hammer