I thought that 'stamp' was intentional as soon as I saw it, you could see him straighten his leg. Odd what goes through the mind of footballers at certain points, when the adrenalin is flowing. Maybe he was a little frustrated that he didn't score again, but it would have been a ridiculous scenario to get a red card.
I liked his overall game, he was a little unlucky not to fashion himself a better chance or shot.