In Final Destination 5, Sam Lawton and Molly Harper is in a plane, they saw Alex Browning yelling "Get off the plane!" which causes Sam's and Molly's death.
If Sam is the first visionary, he pass the Flight 180 Curse to Alex Browning.
Then Alex Browning pass it to Kimberly Corman.
Since Kimberly Corman and Wendy Christensen are "cousins" Kimberly pass it to Wendy.
And Wendy Christensen pass it to Nick O'Bannon since they lived in McKinley, Pennsylvania.