Mason rolling over?

Last night Mason was laying on his play mat and Sawyer was playing with him. Well actually Sawyer was giving him hugs, then stealing Mason's pacifier, running away, wait for Mason to cry and then would give Mason back his pacifier saying "here you go Mason" as if he was the Big Brother Hero. At one point though Sawyer grabbed Mason's shirt on his side and pulled Mason so that he had rolled over. Sawyer then looked up at me and said "over" to which I replied "Mason rolled over?" and Sawyer said "yeah Mason rolled over". Of course Mason hasn't rolled over on his own yet - he has his big brother to do all the work for him!