Espi, I can assure you I did not laugh at the kid when he was doing the deads. I nearly did go and talk to him about the form in fact but chose to walk away instead. He was looking around to see how many people were watching him and strutting around so not very receptive looking to me. I didn't start to laugh at him until he sat down and showed off his butt crack.... Almost the entire butt crack.
That sort of speaks to the fact that he is a pretty unaware person and most probably would not have accepted any advice from me.