Brian Williams has some fun with Al Roker

Within a two-minute period, the NBC anchor said to Al Roker:

-- "'Phalanx' is my word, get your own."

-- "I love the hat, it's very 'Mad Men.'"

He then mocked Roker as the "Today" weatherman tried to get the attention of President Obama and first lady Michelle Obama as they walked by where Roker was standing in the viewing stands.

-- Kate Aurthur