At that point in his speech he was thanking people. He got off on a bit of a tangent when he thanked his friend Mark Burnett, producer of the Apprentice, for his introduction. It was a humorous anecdote, he jokingly asked everyone to pray for Arnold and the show's ratings.
See for yourself if you like, skip to 2:37 for the moment in question.
These posts rate right up there with. "Child Trapped in Refrigerator, Eats Own Leg to Escape."
Celebrity president makes stupid pop culture feuds a priority: surprised?
Trump is a master marketer and is doing everyone a favor, including Arnie, with this type of rhetoric. It keeps everyone interested and coming back to see what will happen next on the apprentice and at the WH. It's a win/win for everyone.