The writer states that more than once, at close quarters with them, he lost his balance and that the effect is both sickening and fun, in a roller-coaster kind of way.

NEWYORKER: All Stripes

There he is over there. (Applause.) By the way, for those of you who have not heard him, outstanding singer and rock-and-roller.

WHITEHOUSE: President Obama Speaks to Town Hall Meeting at University of Maryland | The White House