As soon as that call was made the Queen looked at me and asked 'what would you have called?'. I had no answer.
There was some bumping before the whistle instigated by Cunningham, but the ref let it go...in fact, he let it go - by my count - 2 times. And then, the 3rd bump suddenly garners a whistle. IMRO, if the first bump wasn't a foul, and the 2nd bump wasn't a foul, why was the 3rd bump a foul? My guess is that the 3rd was deemed harder than the first 2 which gave Cunningham an 'advantage', which is the magic word differentiating incidental contact and a foul.
Regardless, as soon as he hit the '3' I agreed with the call. A definite no-brainer!