Dennis Quaid used the weekend he spent golfing with U.S. President Bill Clinton as inspiration for his role as a secret service agent in new movie Vantage Point.

Quaid and his then-wife Meg Ryan joined Clinton for a short stay at The White House in 1999, and the actor was amazed by how the secret service launched into action when he joined the President for a round of golf.

He says, "It was a slow news weekend and Hillary (Clinton) was out of town and we played golf. We went in the presidential motorcade to play golf. It's amazing - you go outside The White House and you get in the car and you never stop. We just had a couple of Subway sandwiches in the back. We got to the golf course and they closed down the golf course (to other members). That's where I got my first eye to the secret service, which turned out to be research for this role... Nothing happens when a president goes some place that's impromptu. It's been chartered out."

(This news article provided by World Entertainment News Network)