Today at a school sports day my son was chosen at random to do the 1500 metres race, before he went to the start line he told me that he was worried and he didn't want to do it because he is a slow runner, I told him it would be fine and he headed of to the start line. As I expected :( my son did very badly in the race, as he came onto the final 100 metre stretch he was in last place and had been lapped by all 29 of the other boys in the race(who were now finished) he looked very red faced and breathless and was only doing a slow jogging pace now. The girls race had started by this point and they were about to pass him, desperate not t be overtaken by the girls he tried to speed up- and fell flat on his face in the attempt- one of the girls took pity on him and helped him up, fare this he continued at walking pace to the finish line, with tears in his eyes and all of the boys laughing at him.
He has been very upset since then and is saying that he doesn't want to go to school tomorrow and that he feels embarrassed and self conscious.
How can I comfort him and try to make him feel better about himself ?