Before the Start of the Doubles Luge

By MARGARET CHEATHAM WILLIAMS, ALEXANDRA GARCIA and AARON BYRD from NYT Sports When they get nervous, Matt Mortensen and Jayson Terdiman think about a waterfall: Nothing can interrupt it. They look at the track; then they hear the lyrics of a rap song: “It’s crunch time.”http://nyti.ms/2EwVtRQ