While he may have been taking the michael, it's a little more complicated.
That's great, but this was his lower back, not the tendons in his neck.
It was the most minor of minor knocks and he was doing a poor job of acting like he was sore.
I don't even know if he claimed or not, it just seems the first reaction of a lot of people is to go down the 'ouch my neck' route as soon as they get even a tiny bump from behind.