My initial reaction was idiot but when you see the replay he just touches Madueki's heel as he's running which knocks both of them off balance and he falls into him, it is a penalty but it's also a bit unlucky. Was good play by Madueki to go down the outside he had the fresh legs and did him with a bit of skill and speed, I suspect he wanted to show him outside but he got done by speed.
What he did afterwards was worse he charged off up the pitch from the kick off trying to be superman lost the ball which started their break which eventually led to the goal. You can't react to mistakes by making another mistake like that it's immature and I expect him to know better at this point in his career.