RedactedNarrative: Vessel 1 was cruising at approximately 4000 rpm, southbound on Lake Powell in Wahweap Bay.  Vessel 2, headed northbound, passed Vessel 1 on the port side roughly 100 to 150 yards away.  Vessel 2 was pushing up a large wake (estimated 6''-10'' ) Vessel 1 turned and crossed Vessel 2''s wake at an estimated 3000 to 3500 rpm.  As Vessel 1 crossed Vessel 2''s wake, it became airborne and then dropped abruptly.  Vessel 1 passenger lost contact with her seat and then came down hard in a seated position.  Victim suffered a compression fracture of a verterbrae and was transported to the hospital in Page AZ.